Manual

I Split System Condensers Installation Instructions I
Figure 8
Heat Pump Typical Low Voltage Control Connections
ELECTRIC HEAT
NO OUTDOOR THERMOSTAT
Indoor
Thermostat
C
--©
White Rogers 1F92 only,
field jumper required
Y1-Wl.
NOTE: White Rogers 1F92
thermostat cannot be used
for direct staging of electric
heat. Outdoor thermostat
must be used for staging.
\
\__
I
INDOOR ACCESSORY
BLOWER ELECTRIC
COIL HEAT PKG.
t
Outdoor
Unit
-0-- O -- (Heat/Cool Relay)
-0-- Y D (Compressor)
-O-- W-- (Electric Heat)
-O-- BLD (Common 24V)
-O-- R_ (24V-Hot)
• SPLICE (WIRE NUT OR SOLDER AND TAPE)
(1) FIRST STAGE ELECTRIC HEAT ALL HEATERS
(2) ADDITIONAL STAGES, ELECTRIC HEAT STAGE 2 = BK,
STAGE 3 = V, STAGE 4 = BR
If electric heat is not used, discard connection shown from electric heat package.
Start-Up Procedure
Start-up Procedure
1. Close electrical disconnects to energize system,
2. Energize crankcase heater on units so equipped,
3, Set Thermostat selector switch to OFF,
4. Set room thermostat at desired temperature. Be sure
setpoint is below indoor ambient temperature for cooling
and above indoor ambient for heating.
5. Set the system switch of the thermostat on COOL and
fan switch for continuous operation or AUTO, as desired.
Operate unit for 15-20 minutes, then check the system re-
frigerant charge if it was necessary to adjust.
6. After the refrigerant charge has been adjusted, the sys-
tem is now ready for continuous operation.
Final Refrigeration Charge Adjustment
Before any adjustment is made to the refrigerant charge, it
is imperative that the air flow characteristics of the indoor
blower be established.
When checking indoor air flow, it is important to remember
that the blower will deliver a higher quantity of air across a
dry coil versus awet coil. Blower charts are calculated with
a dry coil.
Recommended air flow for installations of cooling units and
heat pumps is 350-450 CFM per ton (12,000 BTUH)
through a wet coil. Refer to indoor unit installation instruc-
tions for proper methods of determining air flow and blower
performance.
To Check System Refrigerant Charge
(Superheat Method), Cooling Only
NOTE: On units with two speed fan control the fan will be
on low speed if the temperature is below 83 ° F. Pull one of
the yellow low voltage wires off the fan control and the unit
will default to high speed fan for servicing. Reconnect wire
after checking.
1. Attach an accurate temperature sensing device to the
suction line approximately 4" - 6" away from the suction
line service valve. The temperature sensing device should
be clamped securely to the suction line, on a horizontal
plane (between 9 & 3 O'clock) and insulated. Record the
suction line temperature.