Giant UG30-32MF1-C2U, UG40-38LF1-C2U, UG60-45MF1-C2U, UG50-38LF-C2U Owner's Manual

RESIDENTIAL CONVERTIBLE GAS-FIRED WATER HEATERS

WARNING

DANGER

(EQUIPPED WITH FVIR TECHNOLOGY)

OWNER’S MANUAL

GAS CONVERSION INSTRUCTIONS

All gas conversions must be performed BY A
QUALIFIED SERVICE AGENCY in accor-

dance with the manufacturer’s instructions and
all applicable codes and requirements of the
authority having jurisdiction. The information
in these instructions must be followed to
minimize the risk of fire or explosion or to
prevent property damage, personal injury, or death.
The qualified service agency is responsible for the
proper installation of the conversion kit. The instal­lation is not proper and complete until the operation

SUPPLEMENT

Conversion instructions

of the converted appliance is checked as specified
in the manufacturer’s instructions supplied with the
water heater.

Natural Gas (NAT) to Propane (LP),

Propane (LP) to Natural Gas (NAT).

CAUTION

THE CONVERSION SHALL BE CARRIED
OUT IN ACCORDANCE WITH LOCAL
CODES, OR IN THEIR ABSENCE, WITH
THE LATEST EDITION OF THE NATURAL
GAS AND PROPANE INSTALLATION
CODE CSA B149.1 IN CANADA OR THE
NATIONAL FUEL GAS CODE ANSI Z223.1
IN THE UNITED STATES.

IMPORTANT

READ THESE INSTRUCTIONS CAREFULLY BEFORE BEGINNING THE INSTALLATION. PROPER INSTALLATION
WILL PROVIDE SAFE & EFFICIENT SERVICE, AND AVOID NEEDLESS EXPENSE NOT COVERED BY THE
WARRANTY. READ THE PRODUCT WARRANTY IN THE OWNER’S MANUAL AND REMEMBER TO FILL OUT
AND RETURN TO THE MANUFACTURER, ALL RELEVANT WARRANTY CARDS AND CERTIFICATES. SHOULD
YOU HAVE ANY QUESTIONS, PLEASE CONTACT YOUR LOCAL DEALER OR REFER TO THE GETTING
SERVICE FOR YOUR WATER HEATER SECTION OF THE OWNER’S MANUAL.

SAVE THIS SUPPLEMENT FOR FUTURE REFERENCES.

540000019-1

© 2018 Giant Factories Inc. Printed in Canada

GI-IM023En-0718

Left Portion

Inner Access Door

Outer Access Door (6) (28)

Burner

Assembly

Gas

Control

Gas Control Knob (1)

(Off-pilot-on)

Gas
Regulator
Cap (3) (5)

Gas

Regulator

Brass Screw (4)

Gas Control

Gas Control Knob (1)

(Off-pilot-on)

Gas

Regulator

Gas Control
Knob Shown In
“OFF” Position (1)

Brass Screw (4)

THIS WATER HEATER IS FACTORY SET TO BURN NATURAL GAS (NAT)

Before putting the water heater into operation, verify that the type of gas supplied to your water heater and the type
of gas your water heater is set to burn are the same. If they are not, refer to these instructions.

The conversion kit supplied in the bag attached to the drain valve of the water heater
contains the following items:

— Propane main burner orifice

— Propane pilot assembly

— Temperature high limit switch set for propane (if necessary)

— Conversion label

The parts required to make this conversion are supplied in a small bag attached to the drain valve of the water heater.
If this bag was not supplied with the water heater, a replacement bag can be obtained from the manufacturer by calling
1-800-363-9354, option 1.

Table 1

Conversion kits

Natural Gas Propane

Model Number

Input Burner Limit No. Input Burner Limit No.
Orifice Switch Orifice Switch

BTU Main High Kit BTU Main High Kit

UG30-32MF1-C2U 32,000 #36 230°F 69999032 30,000 1.7 mm 230°F 69999031

UG40-38LF1-C2U 38,000 #32 230°F 69999034 38,000 1.9 mm 230°F 69999033

UG50-38LF-C2U 38,000 #33 240°F 06999004 36,000 #49 250°F 06999005

UG60-45MF1-C2U 45,000 3.25 mm 230°F 06999030 42,000 #47 210°F 06999009

Converting your natural gas (NAT) water heater to propane (LP):

1. Shut down your water heater by rotating and
partially depressing the gas control knob
clockwise to the “OFF” position.

2. Turn “OFF” the gas supply.

3. Remove the cap from the gas regulator on the gas control.

 4.Removethebrassscrew.Rotatethescrew180˚andinsertscrew

back into gas regulator (the arrow on the brass screw indicating “LP”
should be pointing to the gas control).

5. Replace the cap over the gas regulator on the gas control.

2

6. Remove the outer access door to the combustion chamber.

Burner Assembly (13) (19)

Burner (14) (17)

Main Burner

Orifice

(15) (16)

Pilot
Assembly (18)

Burner Assembly (13) (19)

Piezo
Ignition Button
(9) (23)

Gas Control

Gas Regulator

Thermocouple

Fitting

(10) (22)

Pilot Tube
Fitting (11) (21)

Gas Manifold
Fitting (12) (20)

7. Disconnect the two (2) wires from the gas control to the high limit switch located
on the right portion of the inner access door to the combustion chamber.

8. Remove the right portion of the inner access door to the combustion
chamber by: first removing the two (2) screws on the right
side of the door and secondly removing the two (2) screws
joining the two (2) pieces together.

9. Disconnect the wire from the spark rod on the pilot

Gas

Control

Burner

Assembly

assembly to the piezo ignition button.

10. Unscrew the thermocouple fitting from the gas control.

Left Portion

Inner Access Door

11. Unscrew the pilot tube fitting from the gas control.

Right Portion
Inner Access
Door (8) (25) (26)

12. Unscrew the gas manifold fitting from the gas control.

13. Remove the burner assembly from the combustion chamber.

14. Separate the burner from the manifold by removing the two (2)
screws on the burner bracket.

15. Remove the natural gas main burner orifice from the manifold tube.

16. Install the propane main burner orifice into the manifold
tube (Supplied in the bag attached to the drain valve).

17. Put the burner back in place by screwing the two (2) screws
on the burner bracket.

18. Replace the pilot assembly set for natural gas with the one supplied
in the bag attached to the drain valve set for propane.

19. Put the burner assembly back into the combustion chamber
ensuring that the flat end of the manifold tube is inserted
in the slot of the manifold bracket welded in the
combustion chamber.

Thermocouple

20. Screw the gas manifold fitting into the gas control.

21. Screw the pilot tube fitting into the gas control.

22. Screw the thermocouple fitting into the gas control.

Outer Access Door (6) (28)

Fitting

(10) (22)

High Limit Switch

(7) (24) (27)

Piezo
Ignition Button
(9) (23)

Gas Regulator

Gas Control

Pilot Tube
Fitting (11) (21)

Gas Manifold
Fitting (12) (20)

23. Connect the wire from the spark rod on the pilot assembly to the piezo ignition button.

24. If necessary, remove the high limit switch (set for natural gas) on the right portion of the inner access door and
replace it by the high limit switch supplied in the bag attached to the drain valve (set for propane).
Refer to Table 1.

25. Inspect the gasket on the interior side of the door for damage. If damaged,
change the gasket.

26. Replace the right portion of the inner access door to the combustion chamber.

27. Connect the two (2) wires from the gas control to the high limit
switch located on the right portion of the inner access door
to the combustion chamber.

28. Install the outer access door to the combustion chamber.

29. Attach the conversion label to the outside of the
water heater near the rating plate. The label should
be filled out and signed by a qualified installer
or service organization.

30. Return the unused parts to the bag for possible
future conversions.

Burner (14) (17)

Main Burner

3

Orifice

(15) (16)

Pilot
Assembly (18)

Converting your propane (LP) water heater to natural gas (NAT):

To convert your water heater from propane (LP) to natural gas (NAT) follow the above steps except:

 4.Removethebrassscrew.Rotatethescrew180˚andinsertscrewbackintogasregulator(Thearrowonthe

brass screw indicating “NAT” should be pointing to the gas control).

15. Remove the propane main burner orifice from the manifold tube.

16. Install the natural gas main burner orifice into the manifold tube (Supplied in the bag attached to the drain
valve).

18. Replace the pilot assembly set for propane with the one supplied in the bag attached to the drain valve set
for natural gas.

24. If necessary, remove the high limit switch (set for propane) on the right portion of the inner access door and
replace it by the high limit switch supplied in the bag attached to the drain valve (set for natural gas).
Refer to Table 1.

Leak Test the Gas Connections before Placing the Water Heater in Operation

Light the water heater as outlined in the owner’s manual. Using a soap and water solution or leak test solution, test
all of the gas connections to the gas control by spraying the solution on them. The appearance of bubbles means that
there is a leak. If this occurs, tighten the connection and re-test.

Conversion Check List

• Have you set the gas regulator on the gas control at the appropriate setting? .................................................. L

• Have you changed the main burner orifice? ....................................................................................................... L

• Have you changed the pilot assembly? .............................................................................................................. L

• Have you changed the high limit switch? (if necessary) ..................................................................................... L

• Have you inspected the gasket on the inner access door? ................................................................................ L

• Have you leak tested all of the gas connections? ............................................................................................... L

• Have you filled out and placed the conversion label next to the rating plate on the water heater? ................... L

Markings

The conversion label provided in this kit MUST BE filled out and placed on the water heater when the
conversion is made.

4