Rinnai Slimfire 252 Operation & Installation Manual page 23

Step 3. Fitting Zero Clearance Box Into Cavity
Slide zero clearance box assembly into the cavity, ensuring the gas
and electricity supplies are accessible.
When preparing a cavity / frame for a zero clearance
installation the total cavity depth MUST also include
the thickness of the external cladding (J), as the
CAUTION
zero clearance box MUST BE installed flush with
the cladding surface, failure to do this will cause
misalignment of the flueing.
Secure the zero clearance box into the cavity (K) with appropriate
fasteners (not supplied).
Install the Rinnai rigid flue system components (L) in accordance
with the 'Flueing Installation Manual For Rinnai Flamefire Heaters'
that is provided with the flue kit.
Ensure there are no wall studs, noggins, ceiling joists,
wiring or other obstruction within the wall and or
ceiling cavity where the flue is proposed to penetrate.
IMPORTANT
Step 4. Unpack The Heater Engine
The heater engine is supplied in one carton, check to ensure you
have all contents as listed on "Carton Contents / Item Checklist" on
page 8 at the start of this manual before proceeding.
Carefully remove carton by removing the straps and lifting the
carton off the appliance. Remove all packaging materials and check
all components for damage. If ANY damage is evident DO NOT
install or operate this appliance. Contact your supplier for advice.
Retain the cardboard carton for use in the "Step 7.
Positioning the Heater Engine".
IDEA
Before installing the heater, check it is the correct gas type, (refer to
the gas type label on the top body panel of the heater). Refer to the
local gas authority for confirmation of gas type if you are in doubt.
Step 5. Preparing Heater Engine
Attach the flue guide rails (M) to the top of the heater engine using
the four pre-drilled holes with four screws (supplied).
Remove (do not discard) the flue access plate (N) three screws
and the gas/electrical access plate (O) five screws.
Flue guide rails screws and pop rivets are supplied
with Zero Clearance kit, part number R2520.
IMPORTANT
Before proceeding any further with the heater engine
installation ensure the cladding for the front of the
enclosure has been fitted (P).
Rinnai
P
23
ENGINE INSTALLATION
J
K
L
N
M
4x Holes
O
RIBF25 OIM