Start-Up (Cooling); Start-Up (Gas Heat); Gas Heat Anticipator Setpoints - York ZF210 Instruction Manual

1088917-YIM-B-1014

Gas Heat Anticipator Setpoints

It is important that the anticipator setpoint be correct. Too high
of a setting will result in longer heat cycles and a greater
temperature swing in the conditioned space. Reducing the
value below the correct setpoint will give shorter "ON cycles
and may result in the lowering of the temperature within the
conditioned space. Refer to Table 24 for the required gas heat
anticipator setting.
Table 24: Gas Heat Anticipator Setpoints
Gas Valve
Honeywell VR8440
White-Rodgers
36C68

Start-Up (Cooling)

Prestart Check List
After installation has been completed:
1. Check the electrical supply voltage being supplied. Be sure
that it is the same as listed on the unit nameplate.
2. Set the room thermostat to the off position.
3. Turn unit electrical power on.
4. Set the room thermostat fan switch to on.
5. Check indoor blower rotation.
• If blower rotation is in the wrong direction. Refer to
Phasing Section in general information section.
Check blower drive belt tension.
6. Check the unit supply air (CFM).
7. Measure evaporator fan motor's amp draw.
8. Set the room thermostat fan switch to off.
9. Turn unit electrical power off.
Operating Instructions
1. Turn unit electrical power on.
2. Set the room thermostat setting to lower than the room
temperature.
3. First stage compressors will energize after the built-in time
delay (five minutes).
4. The second stage of the thermostat will energize second
stage compressor if needed.
Post Start Check List
1. Verify proper system pressures for both circuits.
2. Measure the temperature drop across the evaporator coil.
3. Measure the system amperage draw across all legs of 3
phase power wires.
4. Measure the condenser fan amperage draw.
54
Anticipator Setpoint
1st Stage 2nd Stage
0.30 amp 0.11 amp

Start-Up (Gas Heat)

Pre-Start Check List
Complete the following checks before starting the unit.
1. Check the type of gas being supplied. Be sure that it is the
same as listed on the unit nameplate.
2. Make sure that the vent and combustion hoods have been
properly installed.
Operating Instructions
This furnace is equipped with an intermittent pilot and
automatic re-ignition system. DO NOT attempt to
manually light the pilot.
Lighting The Main Burners
1. Turn "OFF" electric power to unit.
2. Turn room thermostat to lowest setting.
3. Turn gas valve knob or switch to "ON" position (See
Figure 25).
4. Turn "ON" electric power to unit.
5. Set room thermostat to desired temperature (If thermostat
"set" temperature is above room temperature, pilot burner
ignition will occur and, after an interval to prove pilot flame,
main burners will ignite).
Post Start Checklist
After the entire control circuit has been energized and the
heating section is operating, make the following checks:
1. Check for gas leaks in the unit piping as well as the supply
piping.
FIRE OR EXPLOSION HAZARD
Failure to follow the safety warning exactly could result
in serious injury, death or property damage.
Never test for gas leaks with an open flame. use a
commercially available soap solution made specifically
for the detection of leaks to check all connections. A fire
or explosion may result causing property damage,
personal injury or loss of life.
2. Check for correct manifold gas pressures. (See CHECKING
GAS INPUT.)
3. Check the supply gas pressure. It must be within the limits
shown on the rating nameplate. Supply pressure should be
checked with all gas appliances in the building at full fire. At
no time should the standby gas pressure exceed 13 in. or
the operating pressure drop below 5.0 in for natural gas
Johnson Controls Unitary Products