NG to LP Conversion Guide

Form CP-UD-GC, P/N 197209R11, page 4
FIGURE 3 - Location of
Holding Tabs on the Air
Restrictor Plate used on
UDAP, UDAS, UDBP, and
UDBS 30, 45, 60, 75, 100,
and 150 and UDBP and
UDBS 125.
A restrictor plate is required
ONLY with propane and only
on the sizes listed.
To install, slide the restrictor in place
so that the 45° angle is hooked over
the rear of the venturi tube.
On the front of the venturi tube, bend
the two tabs as shown to hold the
restrictor in place.
To remove, carefully unbend tabs.
Instructions (cont’d)
4B) Select and follow the
instructions for type of
conversion and size of
heater.
FIGURE 2 -
1) Location of the
BurnerOriceonall
Models and Sizes
2) Location of the Air
Restrictor Plate on
UDAP, UDAS, UDBP,
and UDBS 30, 45, 60, 75,
100, and 150 and UDBP
and UDBS 125 when
used with Propane only
BurnerOrice(NOTE:Before
installingtheneworice,verify
the marking with the size listed
in TABLE 1, page 3.)
Gas Flow from Gas Valve
• Air restrictor plate
must be added when
converting models and
sizes listed to propane
• Air restrictor plate must
be removed when
converting to natural gas.
Venturi
Tube
Air Restrictor Plate FOR PROPANE ONLY -
Applies to UDAP, UDAS, UDBP, and UDBS 30,
45, 60, 75, 100, 150 and UDBP and UDBS 125
Tabs are
not bent;
bend tabs to hold
restrictor in place.
See FIGURE 3.
WARNING
Failure to properly install the air restrictor plate could cause
property damage, personal injury, and/or death.
Restrictor Plate Tabs
Natural Gas TO Propane - Applies to Models UDAP/UDAS/UDBP/
UDBS 30, 45, 60, 75, 100, 150 and UDBP/UDBS 125.
1) Refer to FIGURES 1 and 2. Locate and carefully remove the gas orice.
2) Slide the air restrictor plate over the venturi opening, positioning as illustrated
in FIGURES 2 and 3. (NOTE: Verify diameter of opening with component list
on page 7.)
3) Refer to FIGURE 3. Holding the air restrictor plate in position, use a pair of
pliers to bend the tabs to “lock” the air restrictor plate to the venturi tube. Be
sure air restrictor is aligned and secure.
4) Install the propane orice selected for the heater in Step 4A, page 3.
Propane TO Natural Gas - Applies to Models UDAP/UDAS/UDBP/
UDBS 30, 45, 60, 75, 100, and 150 and UDBP/UDBS 125.
1) Refer to FIGURES 1 and 2. Locate and carefully remove the gas orice.
2) Refer to FIGURES 2 and 3 and locate the air restrictor plate on the venturi
tube. Using a pair of pliers, very carefully unbend the tabs and remove the air
restrictor plate.
3) Install the natural gas orice selected for the heater in Step 4A, page 3.
Natural Gas TO Propane OR Propane TO Natural Gas - Applies to
Models UDAP/UDAS Size 125 and UDAP/UDAS/UDBP/UDBS Sizes
175, 200, 225, 300, 350, 400
1) Refer to FIGURES 1 and 2. Locate and carefully remove the gas orice.
2) Install the orice selected for the heater in Step 4A, page 3.
NOTE: Natural gas to propane kit for UDAP/UDAS 125 and kit for UDAP/UDAS/
UDBP/UDBS Size 175 include a primary air restrictor that will not be used.