Installation Instructions for:
Vertical |
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Snap Action |
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3 REMOVING OLD THERMOSTAT (cont’d)
If no heat anticipator/indication is showing, do not be concerned; move on to the next step.
ATTENTION! This product does not contain mercury. However, this product may replace a unit which contains mercury.
Do not open mercury cells. If a cell becomes damaged, do not touch any spilled mercury. Wearing
YOUR THERMOSTAT REPLACES
System | Models | |
Standard Heat Only Systems |
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Electric Furnace | ||
Heat Pump (No Aux or Emergency Heat) | ||
Gas or Oil Heat | ||
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Millivolt Heat Only Systems |
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1 PREPARATIONS
Assemble tools required: power drill, flat blade screwdriver, wire cutter/stripper, level.
Failure to follow and read all instructions carefully before installing or op- erating this control could cause personal injury and/or property damage.
2 THERMOSTAT FEATURES
Mounting
Screw
Captive | 4 |
screws |
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WALLPLATE
60 | 70 |
50 | 80 |
| 90 |
Mercury must not be discarded in household trash. When the unit this product is replacing is to be discarded, place in a suitable container. Refer to www.white- rodgers.com for location to send product containing mercury.
4 MOUNTING AND WIRING
!WARNING
Do not use on circuits exceeding specified voltage. Higher voltage will damage control and could cause shock or fire hazard.
Do not short out terminals on gas valve or primary control to test. Short or incorrect wiring will damage thermostat and could cause personal injury and/or property damage.
Thermostat installation and all components of the system shall conform to Class II circuits per the NEC code.
A.Remove base from subbase or wallplate: Loosen the screws on the base and remove.
B.Mount switching subbase or wallplate: Use the screws provided to mount the subbase or wallplate to wall (see Fig. 1).
C.Attach wires to appropriate terminals: Two wire systems (Heat Only). Attach one wire to RH and one to wire W.
D.Mount Thermostat Base: Gently push excess wire back into the wall opening and plug hole with a fi
!CAUTION
Take care when securing and routing wires so they do not short to adjacent terminals or rear of thermostat. Personal injury and/or property damage may
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| RH |
50 | 60 | 70 | 80 |
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| 90 | |||
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| THERMOSTAT |
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| BASE |
| COVER | W | ||
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Figure 1. Thermostat with subbase or wallplate
SWITCHING
SUBBASE
G
| S | Mounting |
O Y | ||
F | S | Screw |
F | ||
| T |
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HE E M A T
Mounting
Screw
occur.
TERMINAL CROSS REFERENCE CHART
New Thermostat |
| Other Manufacturers’ |
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Terminal Designation |
| Terminal Designation |
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R H | 4 | R H | M | R 5 | R |
W | W | W | H | 4 | W |
3 REMOVING OLD THERMOSTAT
5 SET HEAT ANTICIPATOR
!CAUTION
To prevent electrical shock and/or equipment damage, disconnect electrical power to the system at the main fuse or circuit breaker until installation is complete.
Before removing wires from old thermostat’s switching subbase, label each wire with the terminal designation it was removed from.
1.Remove Old Thermostat: A standard thermostat consists of three basic parts:
a.The cover, which may be either a
b.The base, which is removed by loosening all captive screws.
c.The switching subbase, which is removed by unscrewing the mounting screws that hold it on the wall or adaptor plate.
Make a note here |
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for future reference |
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and use in step 5. |
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The heat anticipator pointer, if adjustable, will be set at one of a series of numbers representing the current rating of the primary control in your furnace. The number will be one of the following: .2, .4, .8, etc. or 0.2, 0.4, 0.8, etc.
Set anticipator to match the setting of your old thermostat you noted in Step 3, or, the anticipator should be set to match the current rating stamped on your main heating control. The heat anticipator is adjustable from 0.15 to 1.2 amps. Adjust the anticipa- tor by rotating the contact arm (see fi g. 2). The anticipator setting is indicated by the numbers on the base that the pointer points to. If you are unsure where to set the anticipator contact the heater manufacturer for a recommended setting.
Move the pointer counterclockwise to |
| Rotate contact arm | |
lengthen heating system cycles; move |
| to adjust heat anticipator | |
clockwise to shorten heating cycles. |
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Adjustments should not be greater than |
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1/2 marking at a time. |
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For millivolt operation, rotate contact arm to |
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Millivolt Link. |
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Snap on Cover: Carefully align the cover |
| Arrow points to the | |
with the base and snap the cover onto | Millivolt Link | ||
current rating of | |||
the base. |
| the primary control |
Figure 2. Anticipator adjustment
PART NO. | |
Replaces | |
| 0920 |