Make-Up Air Installation Manual

01/17/2013 EI902

Clearance – Duct Surface Areas, Duct Installation, Etc.

When installed within air handler plenum or furnace/A-coil plenum, the codes and rules relating to clearance

apply.

When installed in an “inline” duct or round pipe adapter for a general distribution boost heater or air make-

up application, observe the following guidelines:

1. This product must be installed in a metal duct, size of the element rack.

2. There shall be no insulation on the inside of this sheet metal duct section.

3. Any flex-pipe or other insulated pipe must be at least 24” from the electric element.

4. Mounting – there must be at least 2” air clearance around all sides of this sheet metal duct section.

5. If there is a need to insulate this duct section for moisture condensation or in an unheated compartment,

it is permissible to wrap insulation around the exterior of this metal duct section.

6. The control box must be positioned so it will not receive water dripping or collection of moisture.

7. See next section on duct sensor installation.

Specification – Table 1

Model Nor. Kw Phase Current + MIN CFM Internal Fuse Ship Weight

1535L 14.4 1 60 900 30 & 50 19

2035L 19.2 1 80 1200 50 & 50 21

1134H 10.8 3 30 600 40 (3) 20

1536L 15 3 42 900 50 (3) 21

+ At full rated voltage.

CFM Chart – Table 2

Temp. Rise Needed 80 70 60 50 40 30

Model Number

CFM CFM CFM CFM CFM CFM

1535L 600 700 790 950 1180 1600

2035L 800 900 1050 1260 1600 2100

1134H 425 500 570 680 850 1140

1536L 600 700 790 950 1180 1600

Temperature Rise Comments

Typically the maximum temperature rise for this product is 40°F for room air inlet or 20°F for elevated

supply temperature from a typical heat pump.

If it is air make-up, outside air, larger temperature rises are permissible, see table above.

Electrical Hookup

Reference: Drawing HH316, the electrical requirements are quite straight forward – element power, 240 or

208 and very basic 24-volt control. The following should give you the necessary information.

1. ELEMENT POWER SOURCE - Locate correct model number and KW size in Table 1 to determine

operating current and minimum source circuit breaker size. According to local codes, building type,

wiring run distance, etc., use the appropriate electric conductor size to bring over the source power.

Connect to fuse block/input terminals.