Heating/Cooling Thermostat Type — Switch 3 provides se- lection of thermostat type. Heat pump or heat/cool thermostats can be selected. Select OFF for heat/cool thermostats. When in heat/cool mode, Y1 is used for cooling stage 1, Y2 is used for cooling stage 2, W1 is used for heating stage 1 and O/W2 is used for heating stage 2. Select ON for heat pump thermostats. In heat pump mode, Y1 used is for compressor stage 1, Y2 is used for compressor stage 2, W1 is used for heating stage 3 or emergency heat, and O/W2 is used for reversing valve (heating or cooling) depending upon switch 4 setting.
O/B Thermostat Type — Switch 4 provides selection for heat pump O/B thermostats. O is cooling output. B is heating out- put. Select ON for thermostats with O output. Select OFF for thermostats with B output.
Dehumidification Fan Mode — Switch 5 provides selection of normal or dehumidification fan mode. Select OFF for dehu- midification mode. The fan speed relay will remain OFF dur- ing cooling stage 2. Select ON for normal mode. The fan speed relay will turn on during cooling stage 2 in normal mode.
Output — Switch 6 provides selection for DDC operation. If set to DDC output at EH2, the EH2 terminal will continuously output the last fault code of the controller. If the control is set to EH2 normal, then the EH2 will operate as standard electric heat output. Set the switch to ON to set the EH2 to normal. Set the switch to OFF to set the DDC output at EH2.
Boilerless Operation — Switch 7 provides selection of boiler- less operation and works in conjunction with switch 8. In boil- erless operation mode, only the compressor is used for heating when FP1 is above the boilerless changeover temperature set by switch 8 below. Select ON for normal operation or select OFF for boilerless operation.
Boilerless Changeover Temperature — Switch 8 on S1 pro- vides selection of boilerless changeover temperature set point. Select OFF for set point of 50 F or select ON for set point of 40 F.
If switch 8 is set for 50 F, then the compressor will be used for heating as long as the FP1 is above 50 F. The compressor will not be used for heating when the FP1 is below 50 F and the compressor will operates in emergency heat mode, staging on EH1 and EH2 to provide heat. If a thermal switch is being used instead of the FP1 thermistor, only the compressor will be used for heating mode when the FP1 terminals are closed. If the FP1 terminals are open, the compressor is not used and the control goes into emergency heat mode.
DIP SWITCH BANK 2 (S2) — This set of DIP switches is used to configure accessory relay options.
Switches 1 to 3 — These DIP switches provide selection of Accessory 1 relay options. See Table 14 for DIP switch combinations.
Switches 4 to 6 — These DIP switches provide selection of Accessory 2 relay options. See Table 15 for DIP switch combinations.
Table 14 — DIP Switch Block S2 —
Accessory 1 Relay Options
ACCESSORY 1 | DIP SWITCH POSITION | ||
RELAY OPTIONS | 1 | 2 | 3 |
Cycle with Fan | On | On | On |
Digital NSB | Off | On | On |
Water Valve — Slow Opening | On | Off | On |
OAD | On | On | Off |
Reheat — Humidistat | Off | Off | Off |
Reheat — Dehumidistat | Off | On | Off |
LEGEND
NSB — Night Setback
OAD — Outside Air Damper
NOTE: All other DIP switch combinations are invalid.
Table 15 — DIP Switch Block S2 —
Accessory 2 Relay Options
ACCESSORY 2 | DIP SWITCH POSITION | ||
RELAY OPTIONS | 4 | 5 | 6 |
Cycle with Compressor | On | On | On |
Digital NSB | Off | On | On |
Water Valve — Slow Opening | On | Off | On |
OAD | On | On | Off |
LEGEND
NSB — Night Setback
OAD — Outside Air Damper
NOTE: All other switch combinations are invalid.
Auto Dehumidification Mode or High Fan Mode — Switch 7 provides selection of auto dehumidification fan mode or high fan mode. In auto dehumidification fan mode, the fan speed relay will remain off during cooling stage 2 if terminal H is active. In high fan mode, the fan enable and fan speed relays will turn on when terminal H is active. Set the switch to ON for auto dehumidification fan mode or to OFF for high fan mode.
Factory Setting — Switch 8 is set to ON. Do not change the switch to OFF unless instructed to do so by the factory.
Units with Modulating Hot Water Reheat (HWR) Option — A heat pump equipped with hot water reheat (HWR) can operate in three modes: cooling, cooling with reheat, and heating. The cooling and heating modes are like any other water source heat pump. The reversing valve ("O" signal) is energized in cooling, along with the compressor contactor(s) and blower relay. In the heating mode, the revers- ing valve is deenergized. Almost any thermostat will activate the heat pump in heating or cooling modes. The Deluxe D microprocessor board, which is standard with the HWR option, will accept either heat pump (Y,O) thermostats or non- heat pump (Y,W) thermostats.
The reheat mode requires either a separate humidistat/ dehumidistat or a thermostat that has an integrated dehumidifi- cation function for activation. The Deluxe D board is config- ured to work with either a humidistat or dehumidistat input to terminal “H” (DIP switch settings for the Deluxe D board are shown in Table 16). Upon receiving an “H” input, the Deluxe D board will activate the cooling mode and engage reheat.
Table 16 — Humidistat/Dehumidistat Logic and
Deluxe D DIP Switch Settings
Sensor | 2.1 | 2.2 | 2.3 | Logic | Reheat | Reheat | |
(ON) - H | (OFF) - H | ||||||
|
|
|
|
| |||
Humidistat | Off | Off | Off | Reverse | 0 VAC | 24 VAC | |
Dehumidistat | Off | On | Off | Standard | 24 VAC | 0 VAC |
Table 17 shows the relationship between thermostat input signals and unit operation. There are four operational inputs for
•Fan Only
•Cooling Stage 1
•Cooling Stage 2
•Heating Stage 1
•Heating Stage 2
•Reheat Mode
33
