Roberts Gorden Combat UHD-Series, Installation, Operation & Service Manual

© 2013 

Ro

b

erts-Gordon LLC

All rights reser

v

ed. 

N

o part of this work co

v

ered 

b

y the copyrights herein may 

b

e reproduced 

or copied in any form or 

b

y any means - graphic, electronic, or mechanical, including 

photocopying, recording, taping or information storage and retrie

v

al systems - without the 

written permission of Ro

b

erts-Gordon LLC.

Printed in U.S.A.

TABLE OF CONTENTS

SECTION 1: Heater Safety...................................................... 1

1.1 Manpo

w

er Req

u

irements ............................................. 1

1.2 Safety Labels and Their Placement ............................. 1
1.3 California Proposition 65 .............................................. 1

SECTION 2: Installer Responsibility ..................................... 5

2.1 Wall Tag ....................................................................... 5
2.2 Corrosive Chemicals.................................................... 5
2.3 National Standards and Applicable Codes .................. 5

SECTION 3: Critical Considerations ..................................... 6

3.1 Basic Information ......................................................... 6
3.2 Man

u

fact

u

red Units...................................................... 6

3.3 Location and S

u

spension ............................................ 6

3.4 Minim

u

m Req

u

ired Installation Clearances ................. 6

3.5 

V

entilation .................................................................... 6

3.6 Gas S

u

pply .................................................................. 6

3.7 Electrical S

u

pply .......................................................... 6

3.8 

V

ent.............................................................................. 6

SECTION 4: Clearances to Combustibles............................. 7

4.1 Req

u

ired Clearances to Comb

u

stibles......................... 7

4.2 Clearances to Comb

u

stibles ........................................ 7

SECTION 5: National Standards and Applicable Codes .....

8

5.1 Gas Codes................................................................... 8
5.2 Aircraft Hangars ........................................................... 8
5.3 Parking Str

u

ct

u

res and Repair Garages ...................... 8

5.4 Electrical ...................................................................... 8
5.5 

V

enting......................................................................... 8

5.6 High Altit

u

de ................................................................ 9

SECTION 6: Duct Heater Installation................................... 10

6.1 General ...................................................................... 10
6.2 S

u

spension ................................................................ 11

SECTION 7: Ventin

g

.............................................................. 12

7.1 

V

enting ....................................................................... 12

7.2 

V

ent Installation .......................................................... 12

7.3 Horizontal 

V

enting ...................................................... 13

7.4 

V

ertical 

V

enting........................................................... 13

7.5 Maxim

u

m 

V

ent Lengths Table  ................................... 13

7.6 

V

ent Material............................................................... 13

SECTION 

8

: Air Supply ......................................................... 1

8

8.1 Separated Comb

u

stion Installation ............................ 18

8.2 B

u

ilding 

V

entilation .................................................... 18

8.3 O

u

tside Comb

u

stion Air S

u

pply ................................. 18

SECTION 9: Gas Pipin

g

........................................................ 19

9.1 Connections............................................................... 19

SECTION 10: Wirin

g

.............................................................. 21

10.1 Positioning Thermostats .......................................... 21
10.2 Lo

w

V

oltage Thermostat 

w

ith One Heater for 

Models UHD[T][X][S][R] 150-250 .............................. 21

10.3 Lo

w

V

oltage Thermostat 

w

ith One Heater for 

Models UHD[X][S][R] 300-400 .................................. 22

10.4 UHD[X][S][R] Series Internal Wiring Diagram for 

Single Stage Gas 

V

alves ...........................................23

10.5 UHD[X][S][R] Series Ladder Wiring Diagram for 

Single Stage Gas 

V

alves ...........................................24

10.6 UHD[T][X][S][R] Series Internal Wiring Diagram for 

T

w

o Stage Gas 

V

alves ...............................................25

10.7 UHD[T][X][S][R] Series Ladder Wiring Diagram for 

T

w

o Stage Gas 

V

alves ...............................................26

10.8 Electrical Connection to the Heater ..........................27

SECTION 11: Operation and Maintenance ..........................2

8

11.1 Pre-Start-Up Checks .................................................28
11.2 Begin Start-Up ..........................................................28
11.3 Press

u

re S

w

itch ........................................................31

11.4 External Controls ......................................................31
11.5 Complete Start-Up ....................................................31
11.6 Instr

u

ction to the User...............................................31

SECTION 12: User Instructions............................................32

12.1 Heater Operation......................................................32
12.2 Lighting Instr

u

ctions .................................................32

12.3 Simple Tro

u

bleshooting ............................................32

SECTION 13: Servicin

g

.........................................................33

13.1 Servicing Instr

u

ctions...............................................33

13.2 B

u

rner Maintenance.................................................33

13.3 Heat Exchanger Maintenance ..................................33
13.4 Gas 

V

alve Maintenance ...........................................34

13.5 Fl

u

e Blo

w

er ..............................................................34

13.6 

V

enting and Air Intake Pipe ......................................34

13.7 Maintenance Checklist .............................................34

SECTION 14: Troubleshootin

g

.............................................37

14.1 General ....................................................................38
14.2 Tro

u

bleshooting For A

u

tomatic Ignition B

u

rner 

Systems...................................................................39

14.3 Tro

u

bleshooting for Flame S

u

pervision System .......40

14.4 Tro

u

bleshooting for Gas 

V

alves ................................41

14.5 Tro

u

bleshooting for Fl

u

e Blo

w

er ...............................41

SECTION 15: Replacement Parts .........................................42

15.1 Gas 

V

alve .................................................................42

15.2 B

u

rner Compartment for Models UHA[T][X][S][R] 

150-250......................................................................43

15.3 B

u

rner Compartment for Models UHD[X][S][R] 

300-400 .....................................................................45

15.4 Ignition Electrode and Flame Probe for Models 

UHD[T][X][S][R] 150-250 ...........................................46

15.5 Ignition Electrode and Flame Probe for Models 

UHD[X][S][R] 300-400 ...............................................47

15.6 Heat Exchanger .......................................................48
15.7 Fl

u

e Blo

w

er for Models UHD[T][X][S][R] 150-175 ....48

15.8 Fl

u

e Blo

w

er for Models UHD[T][X][S][R] 200-250  ...49

15.9 Fl

u

e Blo

w

er for Models UHD[X][S][R] 300-400 ........50