Product Description; Duckwork Considerations; Site Selection - McQuay IM-811 Installation And Maintenance Manual

PRODUCT DESCRIPTION

When matched with the appropriate air handler(s) or evapora-
tor coil(s) the AHP090/120 heat pump complies with the mini-
mum efficiency equirements found in ASHRAE 90.1-1999.
See the product catalog for the indoor model selection recom-
mendation.
Units operate in the same manner as most heat pumps. How-
ever, these products use a TXV in lieu of a flowrater/piston
system for refrigerant management.
Units are intended for use with a single stage room thermo-
stat. This thermostat is not supplied with this equipment. Only
thermostats that use 24-volt control circuitry are to be used.
Table 2: Physical Data
Net Weight (Lbs.)
Shipping Weight (Lbs.)
Refrigerant
Compressor Type
Quantity
Oil Charge Initial/Recharge
Condenser Fan Type
Fan Diameter (in)
Fan Motor Type
Fan Motor (HP)
Fan Motor (RPM)
Nominal Cond. Airflow (CFM)
Condenser Coil Material
2
Face Area (Ft )
Refrigerant Connections
Suction Line Connection (in)
Liquid Line Connection (in)
High Pressure Control (PSIG)
Low Pressure Control (PSIG)
Thermal Expansion Valve

DUCKWORK CONSIDERATIONS

For proper performance, size the indoor ductwork to accom-
modate 375-425 CFM per ton of cooling with a static pressure
not to exceed .5" WC. Inadequate ductwork that restricts air-
flow can result in improper cooling performance and compres-
sor failure.

SITE SELECTION

This unit is designed for outdoor installations only.
Air Supply
Units are air-cooled heat pumps. To provide optimum unit
performance, the installation site should provide unobstructed
airflow. See Figure 1 for minimum clearances from other air-
cooled condensers/heat pumps and obstructions such as walls
or overhangs.
Note: Adequate service clearances must also be consid-
ered.
Page 6
AHP090 AHP120
365 415
390 440
R-22
Scroll
1
85/81 110/106
Propeller
26
Direct Drive PCS
1
1100
6600
Riffled Copper Tubes / Al Fins
30
Sweat Type
1-3/8
5/8
425 Cut-out / Manual Reset
7 Cut-out / 25 Cut-in
1
Figure 1. Recommended Clearances
60"
Refrigerant System Requirements
The selected site should be no greater than 50' below or 70'
above the evaporator section. For optimum performance, use
the minimum length of interconnecting tubing. Where possi-
ble, minimize the amount of bends and turns.
Wiring and Tubing Protection
Electrical wiring and refrigerant tubing is to be protected from
damage due to incidental contact, such as being walked upon.
Vibration and Sound Control
Units are engineered to produce the minimum sound and
vibration. To minimize sound or vibration issues, securely
mount the unit to a surface that is:
• Solid
• Greatest practical mass
• Ridged
• Minimum radiating surface
Where possible, the slab for a ground level unit should not be
connected to the wall or the building.
Prohibited Locations
Do not locate this unit in the following locations:
• Inside a building
• Directly under a vent termination from a gas appliance
• Within 3 feet of a gas appliance vent
• Where water may rise into the unit
12"
12" 12"
24"
IM-811