Raypak 538 To 4224 - Manual (Page 7)

PART 2 - SECTION I - INSTALLATION INSTRUCTIONS
8
Raypak recommends a minimum length of
vertical flue of three (3) metres to ensure
correct draft.
OUTDOOR INSTALLATIONS.
An outdoor heater must not be installed inside
any roofed structure or under eaves, roof
overhangs, or pool decks. It should also be at
least 1500 mm, in any direction from any
window or fresh air opening.
When installing the heater on a raised base,
please make sure that the base material is
solid and filled in. E.G. If steel mesh decking is
used, a suitable plate material must be used to
fill in the perforations. This is very important, as
any excessive drafts must not be able to enter
the unit from directly underneath.
HIGH WIND CONDITIONS
On rare occasions or in areas where high
winds frequently occur, it may be necessary to
locate the heater a minimum of one (1) metre
from high vertical walls, or install a wind break
so that the heater is not in direct wind current.
Models 538 to 1852, where the installation
may cause "Down draft", Raypak can supply a
Wind Deflection Plate (at extra cost), to
eliminate constant ignition failures or flame
disturbance, the need for which would be
determined by an approved Raypak Service
Person or Agent.
In areas of "constant extreme winds" or where
a Wind Deflection Plate is not appropriate, it
may be necessary to replace the "standard"
low profile outdoor hood with a HIGH WIND TOP
which would be at extra cost.
The HIGH WIND TOP serves the same function
as the low profile outdoor hood and should be
installed in accordance with the same
clearance requirements.
GAS SUPPLY
The gas supply pipe must be sized to give
sufficient pressure for the correct operation
of the heater. The gas line must be fitted
with an isolation valve. Consult AG 601 for
further details.
Caution: The gas supply must be isolated from
the heater during pressure testing of the gas
fitting line.
Dissipate test pressure before reconnecting to
the heater.
Failure to follow this procedure may result
in damage to the gas valve. (Over
pressured valves and equipment are not
covered by our warranty.)
The heater and it's gas connection must be
thoroughly leak tested before placing in
operation. Use soapy water and a manometer
for leak test.
DO NOT USE NAKED FLAME.
WATER CONNECTIONS AND
SYSTEM PIPING
The heater must be installed to the appropriate
and/or local codes. For typical piping systems
and heater applications it is essential that
Raypak be consulted, Raypak heaters do have
some special requirements and if you are not
familiar with Raypak products we can save you
unnecessary inconvenience!
Water pipe connections to heater are:
538 to 1292 - 50 mm copper slip fit or 2" NPT,
1362 to 1922 - 80mm BSP and
2004 to 4224 - 100 mm BSP.
Do not reduce the pipework size and heater
water connections without allowing for any
friction loss which will occur. Low water flow
will cause damage to the heater and system
components. Please install pipework using
approved fittings and isolating valves that will
allow easy disconnection for any future
maintenance requirements.
Use a minimum of one (1) metre of copper or
stainless steel tube for the final connections to
the heater inlet and outlet.
NEVER CONNECT LOW TEMPERATURE PVC
PRESSURE PIPE DIRECTLY TO THE HEATER.
A non-return valve must be installed on the
inlet side of the heater, after the filter.
AGA Approved Cowl
Distance above roof must be
as stated in AG601
Self-supporting flue
Bolted sleeve
Correct draft converter
(Indoor hood)
Minimum
flue length
3 metres
Heater
Water
Connections
Gas
Connection
This area must be
filled in
• On large elevated
decks fill in to at
least one metre all
around unit
Elevated Deck
Prevailing
Winds
Wind Deflection Plate
High Wind Windbreak
610 mm
HIGH WIND TOP