TPI UH Series Installation Instructions Manual

ELECTRIC UNIT HEATER

INSTALLATION

UH SERIES

INSTRUCTIONS

3KW THRU 15KW

MODEL DESIGNATION SYSTEM

EXAMPLE: H 1 H UH 15 C A 1 000

Volts Mfg. Code
Phase Control Volts
Motor Voltage Control Transformer
Model Series Control System
Heater Wattage

MODEL NUMBER CODE:

Volts: F=208, H=240, HF=240/208, G=277, P=480
Phase: 1=Single Phase, 2=Single or Three Phase,

3=Three Phase
Motor Voltage: F=208, HF=240/208, G=277,

P=480

Model Series: UH Series
Heater Wattage: 03=3.3KW, 05=5KW,

07=7.5KW,
10=10KW, 12=12KW , 15=15KW

Control System: C=Built in contactor, O=No
contactor , R=Time Delay Relay

Control Transformer: O-none, A=Included
Control Volts: 1=24, 2=120, 3=Line V oltage
Mfg. Code: May include up to three letters or

digits to identify various listed options or alternate
components.

Heater Size A B C D E F G H I

3.5, 7.5, 10KW 20 18 3/4 13 5 7/8 4 3/4 9 1 5/8 6 1/2 11

12.5 & 15 KW 22 21 1/4 15 8 3/8 4 3/4 10 1 5/8 7 1/2 12

Air Flow Characteristics

Velocity of Air Movement (FPM)

Distance From Heater

Heater KW

3 & 5 105 fpm 45 fpm 17 fpm 28 ft. 45 lbs.

7.5 & 10 210 fpm 80 fpm 25 fpm 36 ft. 50 lbs.

12.5 & 15 270 fpm 95 fpm 45 fpm 46 ft. 55 lbs.

6 ft. 12 ft. 24 ft.

Throw

Distance

Approx.

Weight

IMPORTANT: OWNER SHOULD RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE

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Rev. 12/01 Form 9143

GENERAL INSTRUCTIONS:

This heater has been designed, tested and manufactured to give the most reliable performance practical. Each unit is given a
final check before shipping to assure that every component is correctly wired and operating properly . The safe and depend­able operation of the heater depends upon proper installation, therefore the manufacturer will not assume responsibility for
equipment installed in violation of any code or standard.

MOUNTING:

The heater can be mounted in either of two positions as shown in figures 2 and 4 and as designed for control box accessibil­ity , mounting space, etc. The control compartment cover requires 14” clearance for opening.

The mounting handle is shipped disassembled. It is to be mounted to the appropriate side of the cabinet, as shown in figures
2 or 4, using the screws provided which are to be threaded into weld nuts on the cabinet. The heater then may be mounted
using the optional accessory wall bracket or supported from the ceiling using bolts or chains attached through 2 holes
provided in the handle. If the heater is to be mounted as shown in figure 4, the louver assembly may be repositioned to direct
the air stream as desired by removing the 3 attachment screws, pulling the assembly off, and reinstalling the desired posi­tion.

ELECTRICAL WIRING:

See diagram posted inside control compartment. The amperage load and the minimum recommended wire size is listed at
the field wiring terminal for each power supply circuit. The NEC requires that overcurrent protection and supply wiring for
electrical heating equipment be rated at least 125% of the full amp-load of the circuit. All supply wiring shall conform to the
latest edition of the NEC and to local codes having jurisdiction. Conduit openings are provided in the back of the wiring
compartment (see figure 3). Make sure all field wiring connections are properly made and are tight.

ELECTRICAL GROUND:

This heater must be grounded before operating as required by the NEC and by applicable local codes. Use a conductor of
the appropriate size, secured to the ground lug in the heater and to a grounded connection in the service panel.

THERMOSTAT:

The thermostat should be located where it will sense the free air movement within the structure. It should not be positioned or
located in direct sunlight or where it will be affected by a localized heat source such as lighting or other heaters. If wall
mounted thermostat is used, it should normally be mounted 5 feet above the floor. It should be connected to the control
terminal block in the heater as shown on the wiring diagram and per instructions packed with the thermostat. All control
circuitry must be per NEC class 1 wiring.

Where one or two walls are exposed to outside environment in smaller building areas, a single unit placed as figure 5 may be
sufficient. Larger building areas may require multiple units installed such as figure 6, especially where three or more wall are
exposed to outside environment. Unit should be arranged for providing perimeter air circulation where the air stream of one
supports that of another.

figure 5

figure 6

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I. SERVICING THE ELEMENTS

The elements assembly , which includes the elements, the element mounting bracket, the automatic limit control and the
element restraining assembly , is designed to be removed as a unit to facilitate element replacement using standard hand
tools.

A. Removing an element

1. Open all electric power supply disconnects to the heater .

2. Disconnect all necessary wiring at element terminals.

3. Remove the outlet louver assembly by first removing the three (3) screws holding the assembly to the cabinet.

4. Remove the two screws securing the element to the bottom of the control panel.

5. Remove wire straps retaining the element to the scroll.

6. Pull the bottom of the element outward allowing the top of the element to slide out of the clearance holes in the control
panel.

7. Repeat steps 4, 5, and 6 to reach desired element.

B. Installing a new element

Be sure the replacement element matches the original part in voltage and wattage ratings as well as in physical size and
shape. Reverse the steps under removing an element. All elements must be installed in the same orientation.

II. SERVICING THE MOTOR AND FAN
A. Removing the motor and fan

1. Open all electric power supply disconnects to the heater .

2. Disconnect the motor wiring inside the control box.

3. Remove the strain relief from the cabinet and pull the motor wiring out of the control box.

4. Remove all the screws holding the inlet assembly to the cabinet. Support the weight of the motor as the last screws
are mounted.

5. Slip the inlet assembly (shroud, motor, fan and fan guard) off of the cabinet.

6. Remove the fan blade from the motor shaft.

7. Snip the wire ties securing the motor lead to the fan guard.

8. Remove the screws securing the motor to the fan guard.

B. Installing the motor and fan

Reverse the steps under removing the motor and fan. Be sure to reconnect the grounding lead as it provides the grounding
for the motor to the cabinet. Replace the motor only with an indentical part. Contact the factory for information regarding
alternate motors. T o prevent overheating and maint ain the design performance, a replacement fan blade must be indentical
to the original blade.

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