Dwyer PLVT1 - Manual

PLVT1 Digital Programmable Thermostat with Heat
Pump
120901
A. Installation, Mounting:
CAUTION:
1. Turn off Model PLVT1, electronic source and the electrical devices (e.g. heater)
which will be connected before installation and maintenance.
2. The installer must be a trained service engineer.
1.
Installation Location:
The thermostat should be mounted on an inner wall 1.5m above the floor in position
where it is readily affected by changes of the general room temperature with freely
circulating air. Prevent direct exposure to sunlight; dripping or splashing area. Do
not place this unit at a location where air circulation is low, or where it has great
temperature changes (e.g. near door). Do not place the thermostat near heat
generating sources (radiators, hot air vents, TV or lights).
2. Wiring:
For Model PLVT1, there are 6 wiring terminals at the back of the thermostat which
are labeled as “C”, “Y” and “G”, “Rc”, “R” and “O/W B”.
Different wirings are for different Mode types.
Mode type 1: Heat only with normal open or normal close valves
Mode type 2: Heat with fan
Mode type 3: Cool only
Mode type 4:Heat pump
Mode type 5: Electric/oil/gas heat with cool
Use one transformer:
Use two transformers:
3. Mounting:
1. Ensure the surface is level.
2. Place the cables at the hole near the terminal block.
3. Insert 2 pcs of wall anchors into the holes of the wall.
4. Fasten the thermostat with 2 pcs of long screws through the 2 mounting holes.
B. Start/Reset:
1.
When the system is reset, all the LCD segments are ON and the measured
temperature will be displayed after a while.
2. Low Battery Check will be done at startup. displays when
battery is low.
3. Latch relay will be turned off at startup.
C. Normal Display Mode:
1.
Temperature detection starts and LCD displays the room temperature.
2. In Heat or Auto mode, defrost function is activated with displayed
when temperature is below 5 °C / 40° F. Heater is on regardless of the setting
temperatures.
3. Below 0 °C/ 32°F, Model PLVT1 will display LO.
4. Above 40 °C / 99°F, Model PLVT1 will display HI.
5.
Press / to adjust heat/ cool setting temperature.
6. Press to select heat/ cool/ auto/ off mode.
7. Press to select fan on/ auto.
key
<Down> key
key <Fan> key