Chromalox WTL-121 installation instructions Installation Instructions, General, Wtl

Installation Instructions

4	WTL
(Supersedes PK478)	PK478

161-506097-001

JUNE, 1995

Type WTL-121/Low Voltage Room Thermostat

		2.75"
		(70)
	0	60	7
	5		0	8
4	0
				0
				4.75"
				(121)
40	50	60 70		80

Specifications — Table A

	Temp.	Contacts	Max AC Volts	Max AC Amps
Model	Range (°F)
WTL-121	40-80	SPST	30 V	1 Amp

1.5"

(38)

GENERAL

Note: Type WTL thermostats are designed for temperature control service only. Because they do not fail safe, they should not be used for temperature limiting duty.

WARNING: Users should install adequate back-up controls and safety devices with their electric heating equipment. Where the consequences of failure may be severe, back-up controls are essen- tial. Although the safety of the installation is the responsibility of the user, Chromalox will be glad to make equipment recommendations.

WARNING: Not for use in hazardous environments as described in the National Electrical Code. Failure to comply can result in explosion or fire.

Thermostat Location

The proper location of the thermostat is most important to insure that it will provide a comfortable temperature. Observe the fol- lowing general rules when selecting a location:

1.Locate thermostat about 5’ above floor.

2.Install thermostat on a partitioning wall, not on an outside wall.

3.Never expose thermostat to direct light from lamps, sun or heating devices.

4.Avoid locations close to doors that lead outside, windows or adjoining outside walls.

5.Avoid locations close to radiators, warm air registers or in the direct path of heat from them.

6.Make sure there are no pipes or duct work in that part of the wall chosen for the thermostat location.

© 2010 Chromalox, Inc.