HEARTH HOME PHFR-MCE-36 Ducted Passive Heat System Installation Guide

: June 10, 2024
: HEARTH HOME

Table of Contents

PHFR-MCE-36 Ducted Passive Heat System
Introduction
Kit Contents
Preparation
Framing (2 X 4 Studs)
Installation Instructions
Maintenance
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

Ducted Passive Heat System for Heat Management
Ducted Passive Heat – Front Discharge: PHFR-MCE-36, PHFR-MCE-48, PHFR- MCE-60, PHFR-MCE-72
Passive Heat Appliance Models: MEZZO-C Series, CRAVE-C Series, ECHELON-C Series
Installation Instructions

PHFR-MCE-36 Ducted Passive Heat System

Leave this manual with party responsible for use and operation.
CAUTION! Risk of Cuts, Abrasions or Flying Debris.
Wear protective gloves and safety glasses during installation. Sheet metal edges are sharp.
CAUTION! Do not install damaged components.
If any parts are missing or damaged, contact your dealer before starting installation. DO NOT install a damaged kit.
DANGER
HOT GLASS WILL CAUSE BURNS.
DO NOT TOUCH GLASS UNTIL COOLED.
NEVER ALLOW CHILDREN TO TOUCH GLASS.

A barrier designed to reduce the risk of burns from the hot viewing glass is provided with this appliance and must be installed for the protection of children and other at-risk individuals.
WARNING! Risk of Fire!

Combustible materials MUST NOT overlap or be placed behind a decorative front.
DO NOT apply combustible materials beyond the minimum clearances. Comply with all minimum clearances to combustibles as specified. Overlapping materials could ignite and will interfere with proper operation of decorative fronts.

Introduction

The Ducted Passive Heat (PHFR-MCE-XX) System conveys warm air from the fireplace into the same room through a front discharge slot connected to the appliance heat management knock outs with the provided flex ducting.
Installation of the Ducted Passive Heat kit must be done in conjunction with the appliance installation.
Installation of this kit MUST be performed by a qualified service technician.
WARNING! Risk of Fire! DO NOT install the Ducted Passive Heat (PHFR-MCE- XX) Heat Management System with models that are not approved. Overheating will occur.
Note: The Ducted Passive Heat Trim Kit is required with the Ducted Passive Heat kit and must be purchased separately.
See Table 1. Follow instructions included with the trim kit to complete installation of the Passive Heat system. The Ducted Passive Heat kit is tested and safe when installed in accordance with this installation manual. It is your responsibility to read all instructions before starting installation and to follow these instructions carefully during installation.
The Passive Heat kit is carefully engineered and must be installed only as specified. If you modify it or any of its components you will void the warranty, and you may possibly cause a fire hazard. Installation must be done according to applicable local, state, provincial, and/or national codes.

REQUIRED TRIM KITS (Purchased Separately)

Table 1.1 Required Trim Kits

Kit Contents

Verify and remove contents from packaging before beginning installation. See Figure 2.1 (Front Discharge).
Note: The flexible duct used with the Ducted Passive Heat is manufactured and marked to the requirements of UL181, Class I air duct.
Contents of Ducted Passive Heat Front Discharge Kit

| Ducted Passive Heat SKU
---|---
DESCRIPTION| SERVICE PART NO.| PHFR-MCE-36| PHFR-MCE-48| PHFR-MCE-60| PHFR-MCE-72
Plenum*| 2560-207| 2| | |
2560-107| | 2| |
2560-208| | | 2|
2560-209| | | | 2
Collar| SRV659-125| 4| 4| 8| 8
Flex Air Duct (6” Diameter x 25 ft.)| 659-200| 1| 1| 1| 1
Gear Clamp: Large| SRV662-803| 4| 4| 8| 8
Hurricane Screw| 2005-861| 14| 14| 24| 24
Replacement part: 2005-861/25| 1| 1| 1| 1
Finishing Trim| 2560-114| 1| 1| 1| 1
Self-Tapping #8 Screw| 030-860| 4| 4| 8| 8
Replacement Part: 030-860/8| 1| 1| 1| 1
Pull Tool| 2600-200| 1 Set| 1 Set| 1 Set| 1 Set
Inner Flue, Top| Service part not available| 2| 2| 4| 4

Plenum: 2560-107 Shown (PHFR-MCE-48)
*Actual part number, size and appearance will vary depending on model.

HEARTH HOME PHFR MCE 36 Ducted Passive Heat System - Figure
1

Figure 2.1 Front Discharge Passive Heat Kit Components

Preparation

Plan the location of the appliance and the warm air duct runs. See Table 3.1.
WARNING! Risk of Fire!

DO NOT fold/kink/pinch/obstruct 6 inch flexible ducts. Appliance could overheat.
Maintain 1 inch clearance around all sides of flexible duct.

AIR DUCT LENGTH (Measurements in Inches)

SIZE| MIN.| MAX.| DUCT Quantity
36| 28| 150| 2
48| 28| 150| 2
60| 28| 100| 4
72| 28| 100| 4**
This is the maximum vent run length possible with the included flex duct. Additional flex duct required for longer vent runs. Contact dealer to order.
Minimum of one inch clearance required around all sides of flexible duct.**

Table 3.1 Air Duct Length & Clearances
*Size 60 And 72 appliance models must use all 4 heat management knock outs unless the addition of 1 alternate heat management system is used (HEAT-OUT-GAS, HEATZONE-GAS) in conjunction with the ducted passive heat.
If alternate heat management systems are used with the Ducted Passive Heat Kit (PHFR-MCE-XX), they must use an outside heat management knockout location on the far left or right of the appliance.
Things to consider:
Electrical Wiring:
It is recommended to maintain wire routing inside the stud pockets to reduce temperatures and visibility of wires.
Construction Materials:
It is recommended to plan ahead to reduce the amount of exposed finishing materials visible through the openings.
Clearance – Sprinkler to Passive Heat
Figure 3.1 references the clearances that must be adhered to when installing a sprinkler head near a passive heat discharge opening.

If the distance from the top of the passive heat front discharge opening to the ceiling is 36 inches or greater, then there is no 36 inch clearance requirement. This is for a ceiling sprinkler head installation only.
Note: When installing a sprinkler head near a heat discharge opening, it is recommended to use a sprinkler head with an Extra High sprinkler activation temperature rating.
- When installing a sprinkler head exterior of the chase, maintain the following clearances to discharge openings (convection slots, passive heat registers, heat zone registers, etc.): 36 inches top, 18 inches sides and 6 inches bottom.
- DO NOT install a sprinkler head inside a chase that is set up for passive heat.

HEARTH HOME PHFR MCE 36 Ducted Passive Heat System - Sprinkler Head
Clearance

Good Faith Guidelines for TV Installations
Above a MEZZO-C / CRAVE-C / ECHELON-C Fireplace with Passive Heat Option (Single-Sided Appliance Shown)

HEARTH HOME PHFR MCE 36 Ducted Passive Heat System - Faith
Guidelines

Framing (2 X 4 Studs)

Clearances to Combustibles
Ducted Passive Heat Front Discharge
Ducted Passive Heat Kit (PHFR-MCE-XX)
Single-Sided or See-Through
WARNING! Risk of Fire! DO NOT allow any combustible or non-combustible objects or materials to be placed where the disruption of airflow in discharge zone could occur. Appliance and combustible materials will overheat.

HEARTH HOME PHFR MCE 36 Ducted Passive Heat System - FRONT
DISCHARGE

MINIMUM FRAMING DIMENSIONS

FRONT DISCHARGE
| A| B| C| D| E| F| G
Height of Discharge Opening| Width of Discharge Opening| Clearance Opening to Framing| Clearance Opening to Ceiling| Clearance Bottom of Appliance to Ceiling| Framing| 2 X 4 Studs
PHFR-MCE-36| Inches| 6| 38-3/4| 50-1/2| 53-1/2| 78| 16 inches (406 mm) on center| 3-1/2
millimeters| 152| 984| 1283| 1359| 1981| 89
PHFR-MCE-48| Inches| 6| 50-7/8| 50-1/2| 53-1/2| 78| 3-1/2
millimeters| 152| 1292| 1283| 1359| 1981| 89
PHFR-MCE-60| Inches| 6| 62-3/4| 50-1/2| 53-1/2| 78| 3-1/2
millimeters| 152| 1594| 1283| 1359| 1981| 89
PHFR-MCE-72| Inches| 6| 74-3/4| 50-1/2| 72| 96-1/2| 3-1/2
millimeters| 152| 1899| 1283| 1829| 2451| 89

Figure 4.1 Clearances to Combustibles – Front Discharge

Installation Instructions

WARNING! Risk of Fire! Remove ONLY the knockouts required for the specific heat management kits being installed. Appliance and combustible materials will overheat.
CAUTION! Risk of Cuts, Abrasions or Flying Debris. Wear protective gloves and safety glasses during installation. Sheet metal edges are sharp.
PHFR-MCE-36 and PHFR-MCE-48 kits must be installed on the two inside passive heat knockouts. Outer knockouts may be used for additional heat management systems (HEAT-OUT-GAS, HEAT-ZONE-GAS). Do not remove the outer knockouts if unused.
PHFR-MCE-60 and PHFR-MCE-72 kits must be installed on all four passive heat knockouts unless a HEAT-OUTGAS or HEAT-ZONE-GAS will be installed.
One additional heat management system may be used in conjunction with the Ducted Passive Heat kit. If an additional heat management system (HEAT-OUT- GAS, HEAT-ZONE-GAS) is installed, that system must use one of the outer (left or right) knockouts. The other three must be maintained for connection to the Ducted Passive Heat kit.
Only one passive heat option may be installed on a single appliance. Passive Heat kits without ducts may not be used in conjunction with the Ducted Passive Heat kit.
Note: For 36 and 48 sized models the kit will include two collars. The two inside knockout locations are the only ones used.

Remove the appropriate knockouts, as called out above, from the top of the appliance by dislodging them with a hammer and then using a screwdriver to remove from the holes. See Figure 5.1.
Remove the insulation plug from each knockout. Discard. See Figure 5.2.
Set an inner flue in each of the holes where the knockouts were removed. See Figure 5.3.
Remove the screws from the heat shield as shown in Figure 5.7. Quantity and location of screws will vary between models.
Bend pull tools and break apart as shown in Figure 5.4 and Figure 5.5.
Insert pull tool into slots on left and right sides of appliance. See Figure 5.6.
Carefully pull the heat shield out of the appliance as shown in Figure 5.7 and Figure 5.8. Discard heat shield. Repeat procedure on other side if application is on a see-through appliance. WARNING! Risk of Fire! Remove all debris and objects from firebox top and appliance top before operating the appliance.
Inspect for and remove all debris that may have accumulated or objects that may have been placed on the firebox top and appliance top during the installation process. All debris and objects must be removed prior to operation of the appliance. Firebox top and appliance top are shown in Figure 5.9.
Install collars over the openings using hurricane screws provided in the kit. PHFR-MCE-36 and PHFRMCE-48 kits must be installed on the two inside passive heatknockouts. Outer knockouts may be used for alternate heat management systems. See Figure 5.10 and 5.11.
PHFR-MCE-60 and PHFR-MCE-72 kits must be installed on all four passive heat knockouts. One additional heat management system may be used in conjunction with the Ducted Passive Heat kit. If an additional heat management system (HEAT-OUTGAS, HEAT-ZONE-GAS) is installed, that system must use one of the outer (left or right) knockouts while the other three must be maintained for connection to the Ducted Passive Heat kit.
Only one passive heat option may be installed on a single appliance. Passive Heat kits without ducts may not be used in conjunction with the Ducted Passive Heat kit.
WARNING! Risk of Fire! DO NOT remove appliance heat management knock-outs unless an approved heat management system is installed. Appliance and combustible materials will overheat.
DUCTED PASSIVE HEAT
(Front Discharge)
Only one passive heat option may be installed on a single appliance.
Ductless passive heat kits may not be used in conjuction with the ducted passive heat kits.
One outside heat management knockout may be used for alternate heat management (HEAT-ZONE-GAS, HEAT-OUT-GAS)
Locate the finishing trim piece and break at the two places noted in Figure 5.12. Bend as indicated in Figure 5.13, Detail A, B, and C.
Install the left and right finishing trim pieces on the framing on the sides of the discharge opening using construction screws or nails as shown in Figure 5.14, Detail A and B. Notice that the screws are installed on the back side of the framing. See Figure 5.14 and Figure 5.29.
Two passive heat plenums are included with the kit and both must be installed with the appliance or the appliance will overheat. The plenums are placed into the framed opening from inside the chase.
WARNING! Risk of Fire! Two plenums MUST be installed for passive heat to function correctly. Overheating of appliance and combustible materials will occur.
Position the first plenum into the wall by turning vertically to clear the studs. See Figure 5.15.
Turn plenum back to horizontal orientation and tilt to bring bottom nailing tabs through the opening first. Rotate the plenum forward to get the top nailing tabs through. See Figures 5.16, 5.17, and 5.18.
Position the plenum adjacent to the finishing trim piece that was installed in Step 11 on the framing as shown in Figure 5.17 and Figure 5.18. The notches in the nailing tabs allow for vertical centering of the plenum and are to be lined up with the edge of the header as shown in Figure 5.19. Mount the plenum into the wall using drywall framing screws or nails. See Figure 5.20.
Note: Finishing trim pieces not installed on all photos.
Place the second plenum into position so that it sits side by side with the other plenum. The two plenums must be centered left to right in the framed opening.
Note: The two plenums must be touching each other in the center of the opening in order for the trim to fit properly. See Figure 5.21.
Insert the center finishing trim piece between the two plenums. See Figure 5.22 and 5.23.
Bend the edge of the left and right side trim pieces over for a reference on where to cut the drywall. See Figure 5.24.
Install collar to bottom side of each plenum using hurricane screws provided in the kit. See Figure 5.25.
Note: The PHFR-MCE-60 and PHFR-MCE-72 require two collars per plenum.
WARNING! Risk of Fire! DO NOT fold/kink/pinch/obstruct 6 inch flexible ducts. Overheating of appliance and combustible materials will occur.
Cut flex venting to appropriate length to run from top of appliance to the bottom of the plenum. Ensure there are no kinks. See Figure 5.26 and Figure 5.27.
Secure flex venting to collars on both the appliance and the bottom of the plenum using the provided gear clamps. See Figure 5.27 and Figure 5.29.
Install self-tapping screw through gear clamp into collar. Repeat for all collars. See Figure 5.28

Finishing

Apply wall sheathing material, such as drywall up to 1/2 in. (13mm) thick up to the edge of the plenum.
See Figure 5.30.
WARNING! Risk of Overheating! DO NOT apply wall sheathing past the edge of the plenum. Overheating of appliance and combustible materials will occur.
WARNING! Risk of Fire! DO NOT block passive heat registers! Overheating of appliance and combustible materials will occur.
Facing Material with Front Trim Kit (PH-FRTTRIMD)
The passive heat kit trim kit is designed to be mounted directly to the drywall surface. Additional facing materials must not be placed behind the trim kit. It is acceptable to place Non-Combustible facing materials up to the edge of the trim kit. See Figure 5.31 and Figure 5.32. Consult the appliance Installation Manual to determine maximum facing material thickness.
Install the required trim kit (PH-FRTTRIM-D) as instructed to complete the installation.
Install trim kit (PH-FRTTRIM-D) as instructed.
NON- COMBUSTIBLE FACING MATERIAL PLACEMENT

Painting
Front Discharge:
The location of the Passive Heat discharge opening could allow for venting and other construction materials to be visible. It is acceptable to paint the vent pipe and other construction materials using a high temperature paint with a minimum of 300 °F (149 °C) continuous exposure rating. Hearth & Home Technologies recommends using black touch up paint (part number TUP-GBK-12) available from your Hearth & Home Technologies dealer.

Maintenance

Service and maintain the gas fireplace per instructions included with the appliance. Keep the air register(s) clean and free of any blockage.

Please contact your Hearth & Home Technologies dealer with any questions or concerns.
For the location of your nearest Hearth & Home Technologies dealer,
please visit www.hearthnhome.com.
Hearth & Home Technologies
7571 215th Street West, Lakeville, MN 55044
www.hearthnhome.com
Hearth & Home Technologies • PHFR-MCE-36, PHFR-MCE-48, PHFR-MCE-60, PHFR- MCE-72 Instructions • 2560-972 Rev. D • 1/23