Installation Manual
2 INST-RGB-20U Rev A
6. Position and secure the recess box to the building structure with suitable screws (galvanized or
stainless steel) through the 8 holes in the sides. (Figure 2)
7. Follow the instruction for your water heater model. (The 2 screws are installed on the water heater.)
Model Number: _______________________
Serial Number: _______________________
Gas Type: ___________________________
8. Install the mounting screw half way through the bracket attached
to the top of the recess box. (Figure 4)
9. Copy the water heater serial number and model number
from the data plate located on the left hand side of the
appliance onto the sticker which is on the inside of the
recess box cover. You will need to know this
information for any future warranty or service work.
10. Install the water heater in the recess box.
a. Lift the water heater into the recess box
and align the mounting screw with the
left keyhole on the top mounting
bracket. Tighten the screw
b. Attach 2 washers and 2 lock nuts to the
studs at the bottom bracket.
11. Remove the caps from the water heater and
install the valve kit.
12. Install the pipes through the access holes
made in step 3.
13. Connect gas, water and electric service to
the water heater. Note: A waterproof
electrical outlet can be fitted inside the
enclosure.
14. Seal all recess box penetrations with
sealant to prevent moisture from leaking out
of the recess box.
15. Install the locking bracket with 2 washers
and 2 lock nuts. (Figure 5)
16. On completion of work, check for gas and
water leaks.
17. Install front cover by inserting the top end
first.
R63LSe: Install
the bracket as
shown with the
lower keyhole on
the left. Remove
the 2 washers
(Figure 2) at the
back of the
recess box.
R/C42e, R/C53e,
& V53e: Install
the bracket as
shown with the
higher keyhole on
the left. The 2
washers (Figure
2) at the back of
the recess box
should remain.
FRONT
FRONT
Figure 5
Figure 4
Left
keyhole
hangs on
mounting
screw
Bottom
bracket
Locking
bracket
COLD
GAS
DRAIN
HOT
Sealant
Require