
22
Thermostat
Units
without
the
neutral
air
dehumidification feature will operate with
most common thermostats. Units with the
neutral air dehumidification feature must use
thermostats with a normally closed (NC)
dehumidification option. The following stats
have been approved for usage with the
dehumidification feature.
Robertshaw
Honeywell
9825i2
VisionPRO
IAQ
Filters
Open filter access bracket and slide correct
filter in with arrow pointing towards the
blower in the direction of airflow.
Replacement filters are 20” x 20” x 1”.
Charging Refrigerant
The unit comes with full charge based on a
25-foot line set. Charging a system in the
field must be based on determination of
liquid sub-cooling and evaporator superheat.
On a system with a thermostatic expansion
valve,
liquid
sub-cooling
is
more
representative of the charge than evaporator
superheat but both measurements must be
taken.
Before Charging
The unit being charged must be at or near
full load conditions before adjusting the
charge.
Units equipped with hot gas reheat must
have the hot gas reheat valves closed to get
the proper charge.
Units equipped with hot gas reheat must be
charged with the hot gas valve closed while
the unit is in cooling mode.
After adding or removing charge the system
must be allowed to stabilize, typically 10-15
minutes,
before
making
any
other
adjustments.
The type of unit and options determine the
ranges for liquid sub-cooling and evaporator
superheat. Refer to Error! Reference source
not found. when determining the proper sub-
cooling.
The vertical rise of the liquid line must be
known in order to adjust the sub-cooling
range for proper charge.
The Clean Air Act of 1990 bans the
intentional venting of refrigerant as of
July 1, 1992. Approved methods of
recovery, recycling, or reclaiming
must be followed.
CAUTION
Summary of Contents for F1-060
Page 31: ...31 ...
Page 36: ...36 Figure 8 Heat Pump Piping Diagram with Indoor Unit above Outdoor Unit ...
Page 37: ...37 Figure 9 Heat Pump Piping Diagram with Outdoor Unit above Indoor Unit ...
Page 40: ...40 Thermostat Installation and Wiring Figure 12 2 Stage Cooling with Electric Heat ...
Page 41: ...41 Figure 13 2 Stage Cooling with Heat Pump and Electric Heat ...
Page 42: ...42 Figure 14 2 Stage Cooling and Electric Heat with Hot Gas Reheat and Humidistat ...
Page 43: ...43 Figure 15 Main Control Board for Units Equipped with Modulating Hot Gas Reheat ...
Page 45: ...45 Figure 17 5kW Electric Heat ...
Page 46: ...46 Figure 18 10 kW Electric Heat ...
Page 47: ...47 Figure 19 15 kW Electric Heat ...
Page 48: ...48 Figure 20 20 kW Electric Heat ...
Page 49: ...49 Figure 21 25 kW Electric Heat ...
Page 55: ...55 ...