Weather-Rite UHA100 Installation, Operation & Service Manual - Danger

UHA L

OW 

P

ROFILE 

U

NIT 

H

EATER 

I

NSTALLATION 

O

PERATION AND 

S

ERVICE 

M

ANUAL

24 of 51

SECTION 10: WIRING

All heater models require constant 120 V / 1Ø / 60 

Hz  power supply. Check heater serial plate for 

electrical rating for proper circuit sizing. For 

servicing, a disconnect switch of proper electrical 

rating should be installed in the vicinity of the heater.

All heaters are equipped with thermostat 

connections suitable to power a 24 V thermostat.

Heater must be wired and electrically grounded in 

accordance with local codes. In the absence of local

codes in accordance with: United States: refer to 

National Electrical Code

®

 NFPA 70 - latest revision; 

Canada: refer to Canadian Electrical Code CSA 

C22.1 Part I - latest revision. 

10.1 Positioning Thermostats 

A room thermostat should be mounted on a 

vibration-free wall or column at a height of 

approximately 5' (1.5 m) from the floor to measure 

the ambient temperature. It should be clear of both 

cold drafts and the direct path of warm air from the 

heater.

Avoid mounting thermostat on outside walls or in 

areas directly exposed to radiant heat or sunlight.

Install wall tag in a visible location near thermostat 

See Page 5, Section 2.1 for wall tag details.

10.1.1 Fan Control

The heater’s axial fan can be used during the off-

season for air circulation. A low-voltage 

programmable thermostat with a fan switch (P/N 

90425400) must be used.

For thermostat connection details, See Page 24, 

Section 10.2.

10.2 Low Voltage Thermostat with One Heater

DANGER

Electrical Shock Hazard

Disconnect electric before service.

More than one disconnect switch may be 

required to disconnect electric from 

equipment.

Equipment must be properly grounded.

Failure to follow these instructions can result 

in death or electrical shock.