®
Combat UHD[S] - Series
Tubular Duct Furnaces
t UHD[S] Models 75 - 125
UHD[S] Models 150 - 400 u
■■ 82% efficiency with use of tubular heat
■■ Helps reduce dirt build-up on burners and helps
extend life of heat exchanger with separated
combustion units.
exchangers and inshot burners
■■ Reliable ignition with direct spark ignition
burners.
■■ Longer life and less maintenance with optional
stainless steel heat exchangers.
■■ Installation and operation flexibility with rear
or top air and flue connections (Models UHD[S]
75 - 125 only).
■■ Install downstream of refrigeration system with
option stainless steel heat exchangers and drain
pan (Models UHD[S] 150-400 only).
1.800.828.7450
TM
Quality in Any Language
®
Combat UHD[S] 150 - UHD[S] 400 Clearances and Dimension Data
Clearances to Combustibles - Low Profile UHD[S] Range (Models 75 - 125)
Above Heater
Below Heater
To Side of Heater
Access Side Door
To Flue
6"
6"
6"
31" Access Clearance
2"
Dimension Data - Standard UHD[S] Range (Models 150 - 400)
Model
150
175
200
225
43
250
43
300
350
400
50
'A' Width
[in]
[in]
[in]
[in]
[in]
43
43
43
50
50
'B' Height
27
27
35.25
1.25
17.6
17
35.25
1.25
17.6
17
35.25
1.25
17.6
17
43.5
1.25
24.7
13.6
43.5
1.25
24.7
13.6
43.5
1.25
24.7
13.6
'C' Duct Connectors
'D' Support Spacing
'F' Center of Flue
1.25
17.6
9.5
1.25
17.6
9.5
'G' Flue Center to
Air Intake Center
6
6
6
6
6
7
7
7
[in]
[in]
[in]
[in]
'H' Position of Flue
4.5
5.9
3.4
4.5
5.9
3.4
4.75
5.9
4.75
5.9
4.75
5.9
4.9
8.7
6.2
4.9
8.7
6.2
4.9
8.7
6.2
'J' Gas Inlet Position
'K' Electrical Supply Position
3.4
3.4
3.4
Top View
Heater must be supported
at these points from above
or below.
D
C
4 x 3/8”Captive Nuts Provided
Support
Centers
19.4”
End View
C
25.5”
Rear View
Air Intake
(UHDS only)
F
G
B
H
Flue
Gas
Supply
Thermostat
Connection
Electrical
Supply
6.5”
2.4”
K
J
A
®
Combat UHD[S]-Series Technical Data
Model
75
100
125
150
175
200
225
250
300
350
400
Total Input
[Btu/h] x [1000]
[Btu/h] x [1000]
75
100
82
125
150
123
175
200
164
225
250
205
300
246
350
385
Total Output
Efficiency
61.5
102.5
143.5
184.5
288.6
315.7
82% - All Models
Number of Burners
Gas Connection
Inlet Pressure
5
6
7
7
8
9
10
¾
11
¾
12
¾
14
¾
14
¾
[in]
½
½
½
½
½
½
[in wc] NG Min.
5
LPG Propane Min. 12
NG & LPG Propane Max. 14
Electrical Supply
115 V / 60 Hz / 1 Ø - All Models
Minimum Air Volume
[CFM]
[°F]
850
950
1020
1360
83
1400
95
2050
73
2100
80
2350
80
2700
86
3120
86
3420
86
Temperature Rise @
Minimum Air Volume
68
78
92
Heat Exchanger Pressure Drop
@ Minimum Air Volume
0.06
2650
22
0.05
3660
22
0.06
4750
20
0.02
5800
20
0.03
6850
20
0.025
7750
20
0.035
8300
20
0.05
8850
22
0.02
10200
23
0.03
13600
22
0.04
14200
22
[in wc]
[CFM]
Maximum Air Volume
Temperature Rise @
Maximum Air Volume
[°F]
Heat Exchanger Pressure Drop
@ Maximum Air Volume
0.36
0.55
0.98
0.16
0.29
0.163
0.253
0.35
0.27
0.48
0.53
[in wc]
Flue Size
Air Intake
Weight
[in] 4 - All Models
[in]
[lb]
4
4
4
4
4
4
4
4
5
5
5
81
92
97
191
211
239
249
254
325
345
345
Installation Code and Annual Inspections:
®
All installations and service of ROBERTS GORDON equipment must be performed by a contractor qualified in the installation and
®
service of equipment sold and supplied by Roberts-Gordon and conform to all requirements set forth in the ROBERTS GORDON
manuals and all applicable governmental authorities pertaining to the installation, service and operation of the equipment. To help facilitate
®
optimum performance and safety, Roberts-Gordon recommends that a qualified contractor annually inspect your ROBERTS GORDON
equipment and perform service where necessary, using only replacement parts sold and supplied by Roberts-Gordon.
Further Information: Applications, engineering and detailed guidance on systems design, installation and equipment performance is avail-
®
able through ROBERTS GORDON representatives. Please contact us for any further information you may require, including the Installation,
Operation and Service Manual.
This product is not for residential use.
This document is intended to assist licensed professionals in the exercise of their professional judgement.
Roberts-Gordon LLC
1250 William Street
P.O. Box 44
Buffalo, NY 14240-0044 USA
Telephone: 716.852.4400
Fax: 716.852.0854
European Office:
Roberts Gordon Europe Limited
Telephone: +44(0) 121 506 7700
Fax: +44(0) 121 506 7701
Toll Free: 800.828.7450
© 2008 Roberts-Gordon LLC All rights reserved. No part of this work covered by the copyrights herein may be reproduced or copied in any form or
by any means – graphic, electronic, or mechanical, including photocopying, recording, taping, or information storage
and retrieval systems – without written permission of Roberts-Gordon LLC.
Printed in U.S.A.
UHDSNA
5M 0308 Orig.
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