Network Thermostat X7-Series Thermostat Installation Guide

: June 6, 2024
: Network Thermostat

Table of Contents

Network Thermostat X7-Series Thermostat
INTRODUCTION
K/H/D RELAY – GENERAL
HUMIDITY OPERATION (K/H/D RELAY ONLY)
FRESH AIR DAMPER OPERATION (K/H/D OR K2)
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Network Thermostat X7-Series Thermostat

Network Thermostat X7-Series Thermostat image

BEFORE YOU START
Please read the entire addendum. The thermostat will need to be correctly wired and conﬁgured for proper operation. Basic HVAC conﬁguration can be performed from the thermostat touchscreen and advanced settings can be accessed on the embedded web pages and/or the Internet.

INTRODUCTION

This addendum addresses the special controls available using the K/H/D and K2 terminals on the X7 Series thermostats. This includes control of humidity, fresh air damper, 7-day / 4-event relay scheduling, manual relay operation, and Indoor Air Quality (IAQ) Control

K/H/D RELAY – GENERAL

The K/H/D relay can be conﬁgured to function as any one of the following controls:

Humidiﬁcation; with or without independent equipment
Dehumidiﬁcation; with or without independent equipment
Fresh Air Damper
Manual Relay Operation
Programmable Schedule *
Indoor Air Quality Control *

Can be conﬁgured for use on K/H/D or K2, but not both

K2 RELAY – GENERAL
The K2 relay can be conﬁgured to function as any one of the following controls:

Fresh Air Damper
Manual Relay Operation
Programmable Schedule *
Indoor Air Quality Control *

Can be conﬁgured for use on K/H/D or K2, but not both

HUMIDITY OPERATION (K/H/D RELAY ONLY)

Humidiﬁcation:
When set to ‘Humidiﬁcation’, this feature allows selection of a humidiﬁcation call only when the heat is running, or independent of a heating call.
The relay energizes a humidiﬁcation call when the indoor relative humidity drops below the value selected, with programmable variance of+/- 2%, 3% or 5% RH.
Example: With Humidify at 35% and a Variance of 5%, a call for humidiﬁcation would start at 30% and turn off when the humidity level reached 40%

Dehumidiﬁcation:
When set to ‘Dehumidiﬁcation’, this feature allows selection of a dehumidiﬁcation call only when the cooling is running, or independent of a cooling call.
When “With Cooling Only” is selected, and there is no dedicated dehumidiﬁcation function integrated within the equipment, cooling will be initiated and the cooling setpoint will automatically be lowered by 2 degrees from the scheduled cooling setpoint to allow increased equipment run time and decreased space humidity levels. The relay energizes a dehumidiﬁcation call when the indoor relative humidity rises above the value selected, with a programmable variance of+/- 2%, 3% or 5% RH Example: With Humidify at 55% and a Variance of 5%, a call for dehumidiﬁcation would start at 60% and turn off when the humidity level drops to 50%.

FRESH AIR DAMPER OPERATION (K/H/D OR K2)

When set to ‘Damper’, the relay will control a 2-position (power open, spring return) damper for fresh air ventilation. The ‘When Occupied’ setting will open the damper and turn on the fan during occupied schedule periods from the thermostat’s normal 7-day schedules. The ‘x min/hr’ setting will open the damper and turn on the fan for the set number of minutes selected. Outdoor Temperature and Humidity Limits allow the setting of the boundaries for energizing the damper, between 120°F (49°C) and -40°F (-40°C), and 0% RH to 100% RH.

SCHEDULE RELAY OPERATION
(K/H/D OR K2) When set to ‘Schedule’, the relay can be conﬁgured to turn on, off, or pulse up to 4 times per day, 7 days a week. The pulsed on option can be conﬁgured from 0.2sec to 2.0sec in 0.1sec increments.
MANUAL RELAY OPERATION
(K/H/D AND K2) When set to ‘Manual’, the relay can turned on or off using any of the remote connection options.
INDOOR AIR QUALITY (IAQ) OPERATION
(K/H/D OR K2) When set to ‘IAQ’, the relay can control multiple types of IAQ equipment, with either manual or automatic operation.
Integrated HVAC – Occupied
Use when IAQ equipment is located inside the HVAC equipment or ductwork. This setting will turn on the IAQ equipment and the HVAC fan during occupied schedule periods from the thermostat’s normal 7-day schedules.
Stand Alone – Occupied
Use when IAQ equipment is located inside the HVAC equipment or ductwork. This setting will turn on the IAQ equipment during occupied schedule periods from the thermostat’s normal 7-day schedules.
Integrated HVAC – Manual
Use when IAQ equipment is located inside the HVAC equipment or ductwork. This setting will allow the manual turning on or off of the IAQ equipment and the HVAC fan. Use this setting for extended occupied or unoccupied periods.
Stand Alone – Manual
Use when IAQ equipment is located inside the HVAC equipment or ductwork. This setting will allow the manual turning on or off of the IAQ equipment. Use this setting for extended occupied or unoccupied periods.
ACCESSORY PORT
The accessory port allows connection of various NetX options, including the NT-MOD-ULE wireless sensor coordinator, the NT-CO2 carbon dioxide sensor, or other future accessories.