VIESSMANN Nu-Air HA Series Hydronic Forced Air Handler Instruction Manual
- June 15, 2024
- VIESSMANN
Table of Contents
- Nu-Air HA Series
- Components
- Technical Data
- Dimensions
- Minimum Clearances
- Heating Circuit Pumps
- Electrical Connections
- System Layout 1
- System Layout 2
- System Layout 3
- System Layout 5
- System Layout 6
- System Layout 7
- System Layout 8
- System Layout 9
- System Layout 10
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)
VIESSMANN Nu-Air HA Series Hydronic Forced Air Handler
Nu-Air HA Series
The Nu-Air HA Series is engineered to be used with hydronic (boiler) systems. Outputs range from 25 MBH to 102 MBH.
The benefits at a glance:
- Total Comfort: Delivers warm comfortable conditioned air, warmer than heat pumps and many furnaces.
- Quiet performance: Engineered and balanced with extra insulation for quiet operation.
- Dependable: Manufactured to precise specifications, using high performance components.
- Accessories: Prewired for heating, cooling, and electronic air cleaners.
- Multi-position: Unit mounts in any direction – upflow, downflow or horizontal discharge right or left. External filter rack for other return air options (included).
- Cooling: Pre-wired for A/C. Just add your favorite evaporator coil and condensing unit from most manufacturers.
- Protection: Built-in safety sensors provide whole house freeze protection, in case of thermostat failure.
- All designs include filter rack.
- All models are compatible with standard or digital thermostats.
Components
Legend
- A Hydronic supply/return connections
- B Heating coil
- C Connections for up to 3 thermostats (for 3 zones and outputs for 3 zone dampers
- D Acoustic sound reduction insulation.
- E Blower motor and controls
Cabinet
All cabinets have a tough, durable powder coat finish on heavy gauge aluminum.
Heating coils
All heating coils are copper and assembled using no lead solder. High density
aluminum fins provide maximum heat transfer for small coil surface.
Fan and motor
Constant speed EC (Electronically Commutated) Motor.
Pump exercise function
Pump terminals, 120VAC. Controlled by the HA including 24 hr. pump exerciser
to eliminate stagnant water.
Zone control logic
Integrated zone control to control up to 3 zones. Zone 1 lead logic prevents
simultaneous heat and cool calls.
Technical Data
| Description| HA 6018| HA 8524| HA 9836
---|---|---|---|---
Motor (ECM)| hp| b| b| c
Motor rated amps – loaded| AMPS| 6.1| 6.1| 9.2
Electrical| VOLTS/PH/HZ| 120/1/60| 120/1/60| 120/1/60
Heating BTUH (kW)| 120°F (49°C)| 25,000 (7.4)| 34,000 (10.0)| 44,000 (13.0)
140°F (60°C)| 35,000 (10.3)| 49,000 (14.4)| 63,000 (18.5)
160°F (71°C)| 46,000 (13.5)| 63,000 (18.5)| 83,000 (24.4)
180°F (82°C)| 56,000 (16.4)| 78,000 (23.0)| 102,000 (30.0)
Flow| USG/min (L/H)| 5 (1135)| 7 (1590)| 7 (1590)
Nominal Air Flow| CFM| 700| 900| 1,200
Cooling capacity| (tons)| 1 to 2| 2 to 2.5| 2 to 3
Cabinet| D x W x H in. (mm)| 19¼ X 22c X 29 (487 X 575 X 737)| 21¼ X
22c X 31½ (539 X 575 X 800)| 21¼ X 22c X 31½ (539 X 575 X 800)
Air Filter Size (Field Supplied)| in.| 16 X 16| 20 X 20| 20 X 20
Supply air opening| in. (mm)| 16 x 20 (406 x 508)| 20 x 20 (508 x 508)| 20 x
20 (508 x 508)
Return air opening| in. (mm)| 14 x 14 (356 x 356)| 18 x 18 (457 x 457)| 18 x
18 (457 x 457)
Weight| lb. kg| 76
35| 93
42| 94
43
Hydronic heating coil
Construction| Copper tubing, aluminum fins, galvanized steel support frame
Rows…fins/in.| | 4/16| 4/16| 4/16
Total face area| sq. ft. (m2)| 1.5 (0.14)| 2.3 (0.21)| 2.3 (0.21)
Piping connections
Supply| in.| b (Sweat)| c (Sweat)| c (Sweat)
Return| in.| b (Sweat)| c (Sweat)| c (Sweat)
Pressure drop through the coil| feet of head [@ 140°F (60°C)]| 4.1| 3.6| 3.6
Permissible ambient temperature
Installation in living spaces or boiler rooms (standard ambient conditions);
- During operation 32 to 104ºF (0 to +40ºC)
- During storage and transport -4 to 149ºF (-20 to +65ºC)
Dimensions
IMPORTANT
The maximum ambient temperature must not exceed 104ºF (40ºC).
| | HA 6018| HA 8524| HA 9836
---|---|---|---|---
a| in. (mm)| 19a (487)| 21a (539)| 21a (539)
b| in. (mm)| 22c (575)| 22c (575)| 22c (575)
c| in. (mm)| 29 (737)| 31b (800)| 31b (800)
d| in. (mm)| 3b (89)| 3c (93)| 3c (93)
e| in. (mm)| 6a (156)| 6a (160)| 6a (160)
f| in. (mm)| 4a (104)| 2a (53)| 2a (53)
g| in. (mm)| 15a (383)| 19a (485)| 19a (485)
h| in. (mm)| 23c (600)| 23c (603)| 23c (603)
Front view
Side view
Legend
A Hydronic supply connection
B Hydronic return connection
Minimum Clearances
Recommended minimum service clearances
For typical Nu-Air HA installation, it is recommended to install the air handler with the clearances shown in the illustration.
a – 24 in. (610 mm)
b – 0 in. (0 mm)
These dimensions reflect the recommended service clearance for the air handler only, ensure adequate clearance is left for the installation of ducting, piping and electrical connections. Ensure to leave adequate clearance for ductwork, plumbing and electrical connections, with zero clearance between the air handler unit and ducting being acceptable.
The Nu-Air HA requires 0 in. (0 mm) clearance to combustibles.
Heating Circuit Pumps
| Flow Rate GPM (L/h) | 3 (681) | 4 (908) | 5 (1135) | 7 (1590) |
|---|---|---|---|---|
| Pressure Drop HA 6018 Ft of Head (mbar) | 1.6 (48) | 2.7 (81) | 4.1 (123) | — |
| Pressure Drop HA 8524 / 9836 Ft of Head (mbar) | — | 1.3 (39) | 1.9 (57) | 3.6 |
(108)
Electrical Connections
WARNING
DISCONNECT POWER BEFORE SERVICING AIR HANDLER.
If any of the original wires as supplied with the appliance must be replaced, it must be replaced with the exact equivalent.
CAUTION
Label all wires prior to disconnection when servicing controls. Wiring errors
can cause improper and dangerous operation. Verify proper operation after
servicing.
Fled **Connections
**
Legend
- A Nu-Air HA control panel
- B EC blower motor
- C 24VAC transformer
- D 120VAC connections
- E Coil temperature sensor
- F Thermostat inputs
- G Call for heat, damper, and condenser outputs
- H Nu-Air HA pump output (120VAC, 1.0A)
- I Nu-Air HA power supply (120VAC/1/60, 12 FLA)
System Layout 1
Legend
- A Viessmann Vitocrossal 300 CU3A high mass boiler
- B System fill with expansion tank
- C Nu-Air HA air handler
- D Thermostat (field supplied)
- E Indirect fired DHW storage tank
- F Air handler pump
Note: System layout is for concept purposes only.
IMPORTANT
Please note location of expansion tank. Sizing of field-supplied pumps are critical for proper boiler operation in this system layout. An undersized pump may cause short-cycling and/or improper operation of the boiler.
Refer to the boiler Installation Instructions for additional information.
System Layout 2
Legend
- A Viessmann Vitocrossal 300 CU3A high mass boiler
- B System fill with expansion tank
- C High temperature heating loop
- D Nu-Air HA air handler
- E Thermostat (field supplied)
- F Low temperature heating loop with mixing valve
- G Indirect fired DHW storage tank
- H Low loss header (or closely spaced tees)
- I Air handler pump
Note: System layout is for concept purposes only.
IMPORTANT
The use of a low-loss header (or closely spaced tees with a maximum spacing of
4X pipe diameter) is strongly recommended if the maximum water flow rate in
the application concerned exceeds the maximum or minimum flow rates of the
boiler or if the system flow rates are unknown.
The low-loss header is available as accessory part.
Please note location of expansion tank.
System separation is required of underfloor heating systems employing non- oxygen diffusion barrier tubing. All components on the secondary side of the heat exchanger must be made of corrosion-resistant materials.
The 3-way mixing valve, built-in to achieve the low temperature level of the underfloor heating circuit, is controlled by an accessory kit for a heating circuit with mixing valve.
Refer to the boiler Installation Instructions for additional information.
System Layout 3
Legend
- A Viessmann Vitodens 222-F B2TA/B boilers
- B System fill with expansion tank
- C High temperature heating loop
- D Nu-Air HA air handler
- E Thermostat (field supplied)
- F Low temperature heating loop with mixing valve
- G Low loss header (or closely spaced tees)
- H Air handler pump
Note: System layout is for concept purposes only.
IMPORTANT
The use of a low-loss header (or closely spaced tees with a maximum spacing of 4X pipe diameter) is strongly recommended if the maximum water flow rate in the application concerned exceeds the maximum or minimum flow rates of the boiler, or if the system flow rates are unknown.
The low-loss header is available as accessory part.
Please note location of expansion tank.
System separation is required of underfloor heating systems employing non- oxygen diffusion barrier tubing.
All components on the secondary side of the heat exchanger must be made of corrosion-resistant materials.
The 3-way mixing valve, built-in to achieve the low temperature level of the under floor heating circuit, is controlled by an accessory kit for a heating circuit with mixing valve.
Refer to the boiler Installation Instructions for additional information.
System Layout 4
Legend
- A Viessmann Vitodens 200 B2HA/B boilers
- B System fill with expansion tank
- C High temperature heating loop
- D Nu-Air HA air handler
- E Thermostat (field supplied)
- F Low temperature heating loop with mixing valve
- G Indirect fired DHW storage tank
- H Low loss header (or closely spaced tees)
- I Air handler pump
Note: System layout is for concept purposes only.
IMPORTANT
The use of a low-loss header (or closely spaced tees with a maximum spacing of 4X pipe diameter) is strongly recommended if the maximum water flow rate in the application concerned exceeds the maximum or minimum flow rates of the boiler, or if the system flow rates are unknown.
The low-loss header is available as accessory part.
Please note location of expansion tank. System separation is required of underfloor heating systems employing non-oxygen diffusion barrier tubing.
All components on the secondary side of the heat exchanger must be made of corrosion-resistant materials.
The 3-way mixing valve, built-in to achieve the low temperature level of the under floor heating circuit, is controlled by an accessory kit for a heating circuit with mixing valve.
Refer to the boiler Installation Instructions for additional information.
System Layout 5
Legend
- A Viessmann Vitocrossal 300 CU3A high mass boiler / Vitodens 200 B2HA/B boilers (shown)
- B System fill with expansion tank
- C High temperature heating loop
- D Nu-Air HA air handler
- E Thermostat (field supplied)
- F Low temperature heating loop with mixing valve
- G Indirect fired DHW storage tank
- H Low loss header (or closely spaced tees)
- I Air handler pump
Note: For installations with multiple air handler units, the call for heat from each air handler must be connected in parallel to the boiler demand.
Note: The low loss header is optional with the Viessmann Vitocrossal 300 CU3A boiler.
Note: System layout is for concept purposes only.
IMPORTANT
The use of a low-loss header (or closely spaced tees with a maximum spacing of 4X pipe diameter is strongly recommended if the maximum water flow rate in the application concerned exceeds the maximum or minimum flow rates of the boiler, or if the system flow rates are unknown.
The low-loss header is available as accessory part.
Please note location of expansion tank. System separation is required of underfloor heating systems employing non-oxygen diffusion barrier tubing.
All components on the secondary side of the heat exchanger must be made of corrosion-resistant materials.
The 3-way mixing valve, built-in to achieve the low temperature level of the underfloor heating circuit, is controlled by an accessory kit for a heating circuit with mixing valve.
Refer to the boiler Installation Instructions for additional information.
System Layout 6
Legend
- A Viessmann Vitodens 200 B2HA/B boilers
- B System fill with expansion tank
- C Thermostat (field supplied)
- D Nu-Air HA air handler
- E Low loss header (or closely spaced tees)
- F Air handler pump
Note: System layout is for concept purposes only.
IMPORTANT
The use of a low-loss header (or closely spaced tees with a maximum spacing of 4X pipe diameter) is strongly recommended if the maximum water flow rate in the application concerned exceeds the maximum or minimum flow rates of the boiler, or if the system flow rates are unknown.
The low-loss header is available as accessory part.
Please note location of expansion tank. Sizing of field-supplied pumps are
critical for proper boiler operation in this system layout. An undersized pump
may cause short-cycling and/or improper operation of the boiler.
Refer to the boiler Installation Instructions for additional information.
System Layout 7
Legend
- A Viessmann Vitodens 100 B1HE boiler
- B System fill with expansion tank
- C Nu-Air HA air handler
- D Thermostat (field supplied)
- E Indirect fired DHW storage tank
Note: System layout is for concept purposes only.
IMPORTANT
Please note location of expansion tank.
If the heating system does not include a DHW storage tank connected to the
boiler the DHW demand contacts of the boiler may be connected to the Nu-Air HA
heat demand, use the DHW temperature set point to set the desired supply
temperature to the air handler.
Note: The integrated boiler pump of the Viessmann Vitodens 100 B1HE boiler may eliminate the need for a dedicated air handler pump, refer to the installation instructions of the Vitodens boiler for available residual head.
Refer to the boiler Installation Instructions for additional information.
System Layout 8
Legend
- A Viessmann Vitodens 100 B1KE boiler
- B System fill with expansion tank
- C Nu-Air HA air handler
- D Thermostat (field supplied)
Note: System layout is for concept purposes only.
IMPORTANT
Please note location of expansion tank.
Note: The integrated boiler pump of the Viessmann Vitodens 100 B1KE boiler may eliminate the need for a dedicated air handler pump, refer to the installation instructions of the Vitodens boiler for available residual head.
Refer to the boiler Installation Instructions for additional information.
System Layout 9
Legend
- A Viessmann Vitodens 200 B2HE series boiler
- B System fill with expansion tank
- C High temperature heating loop
- D Nu-Air HA air handler
- E Thermostat (field supplied)
- F Low temperature heating circuit with mixing valve
- G Low loss header (or closely spaced tees)
- bDHW tank
- I Air handler pump
Note: System layout is for concept purposes only.
IMPORTANT
The use of a low-loss header (or closely spaced tees with a maximum spacing of
4X pipe diameter) is strongly recommended if the maximum water flow rate in
the application concerned exceeds the maximum or minimum flow rates of the
boiler, or if the system flow rates are unknown.
The low-loss header is available as accessory part.
Please note location of expansion tank.
Note: The integrated boiler pump of the Viessmann Vitodens 200 B2HE boiler may eliminate the need for a dedicated air handler pump, refer to the installation instructions of the Vitodens boiler for available residual head.
Refer to the boiler Installation Instructions for additional information.
System Layout 10
Legend
- A Viessmann Vitodens 200 B2HE series boiler
- B System fill with expansion tank
- C High temperature heating loop
- D Nu-Air HA air handler
- E Thermostat (field supplied)
- F Low temperature heating circuit with mixing valve
- G Low loss header (or closely spaced tees)
- H DHW tank
- I Air handler pump
Note: System layout is for concept purposes only.
IMPORTANT
The use of a low-loss header (or closely spaced tees with a maximum spacing of
4X pipe diameter) is strongly recommended if the maximum water flow rate in
the application concerned exceeds the maximum or minimum flow rates of the
boiler, or if the system flow rates are unknown.
The low-loss header is available as accessory part.
Please note location of expansion tank.
Refer to the boiler Installation Instructions for additional information.
Nu-Air
HA Series, Models 6018, 8524 and 9836
The Nu-Air HA works directly with other hot water sources to provide warm
comfortable heating for any home or small commercial building.
Printed on
environmentally friendly (recycled and recyclable) paper.
Technical information subject to change without notice.