Replacement Parts List

ManualsBrandsReznor ManualsUDAS Separated Combustion HeatersUDAS-175 Direct Vented Separated Combustion Gas Fired Unit Heater w/ Horizontal Roof Vent Kit - 175,000 BTU

1

2

3

4

5

6

7

8

9

Form P-UD, P/N 270285R4, Page 6

Electrical Components - See locations on pages 4 and 5.

CODE 1 - High Temperature

Limit Control, Auto Reset

CODE 4 - Flame Rollout

Switch, Manual Reset

CODE 7 - Circuit Board (DSI Ignition

Control), P/N 195265, UTC 1097-210

CODE 8 - Flame Sensor,

P/N 195292

CODE 9 - Ignitor (Electrode

Assembly), P/N 175272

CODE 10 - Transformer

115V-25VA, P/N 175265

115V-40VA, P/N 194808

208/230V-40VA, P/N 194536

CODE 13 -

Fan Motor

Capacitor

CODE 15 -

Gas Valve

See application by P/N, Type, and Size on page 5.

See Serial No. Decoding on page 3.

Single-Stage

Gas Valves

Two-Stage Gas

Valve

CODE 12 - Fan Motor

See motor application and

P/N’s on page 5.

For fan blade P/N’s, see

page 11.

Fan Blade/

Motor Spacing

by Unit Size

and Type of

Fan Guard

CODE 14 - Pressure

Switch, H/W #IS2

See application and

P/N’s on page 5. For

high altitude (above

6000 ft) , see page 16.

CODE 16 - Terminal Board, 24V, 4 pole,

P/N 196813

CODE 17 - Terminal

Board Gasket for UDAS

and UDBS, P/N 196327

CODE 19 - Interlock

Door Switch,

UDAS and UDBS,

P/N 217262

CODE 20 -

Disconnect

Switch, UDAS

and UDBS

CODE 11 - Stepdown Transformer

460V-120V, 1/2 KVA (500VA),

P/N 11100

575V-120V, P/N 202056

(Stepdown transformer is not in the

control compartment; it hangs on the

outside of the heater cabinet.)

UDAP/UDAS 30, P/N 197033, 210°F, Violet Dot

UDAP/UDAS 45, 60, 75, P/N 196949, 225°F, Red Dot

UDAP/UDAS 100, 125, P/N 196950, 250°F, Yellow Dot

P/N 45602, 180°F, No Dot

P/N 85449, 200°F, Yellow Dot

P/N 96512, 220°F, Blue Dot

P/N 202048, 240°F, Silver Dot

P/N 201962, 250°F, Orange Dot

P/N 201961, 275°F, Green Dot

Bracket, P/N 170026

Plate, P/N 170025

P/N

Serial

No. Code

Replacement for

Serial No. Code

196981 Y3 or Z8

196983 Y5 or 1A

260603 6E Y2, Z7, X7, or Z3

263999 9E Y4, Z9, X9, or Z5

P/N

Serial

No.

Code

Replacement

for Serial No.

Code

197066

Y8 or

4A

X8 or Z4

197067

Y9 or

5A

197064

Y6 or

2A

Y1 or Z6

197065

Y7 or

3A

To replace

fuse, use

P/N 201685

or a eld

supplied

Type ATC or

ATO 3 amp

fuse, Color

Code Violet

UDAP/UDAS

Size

A = Fan Spacing

Setscrew

Torque

(in/lbs ±10)

Standard Wire Fan Guard

with .5” (13mm) Spacing

Option AZ8 Wire Fan Guard with

.334” (8.5mm) Spacing

30 1” 25 mm 1” 25 mm

80

45 9/16” 14 mm 1-1/16” 27 mm

45-LN 3/4” 19 mm N/A

60 1-1/2” 38 mm 1-3/4” 44 mm

75 2-1/8” 54 mm 1-1/2” 38 mm

100 2-3/8” 60 mm 2-3/8” 60 mm

120

125 2-5/16” 59 mm 2-1/8” 54 mm

150 2-3/8” 60 mm

N/A 130

175 2-1/8” 54 mm

200 1-5/8” 41 mm

225/250/300 2” 51 mm

350 1-7/8” 48 mm

400 1-3/8” 35 mm

A

Fan Blade

Sizes

30-250

Motor

Setscrew

A

Sizes

300-400

Motor

Fan

Blade

Setscrew