17
MB Pool & spa heater
PVC Pipe
2" CPVC Adapters
Inlet/Outlet Header
CONNECTIONS
All Models
LOCATION
The heater requires water fl ow and pressure to op-
erate properly. It must therefore be installed down-
stream of the discharge side of the fi lter and pump.
A typical installation is plumbed as follows:
1. The Pump outlet is plumbed to the inlet of the Filter.
2. The outlet side of the Filter is then plumbed to the
inlet of the Heater.
3. The outlet of the Heater is plumbed to the return
line to the pool or spa. The Pump, Filter and Heater
are plumbed in series.
Plumbing from the heater back to the pool must not
have any valves or restriction that could prevent fl ow
when the pump is operating.
Use the pressure loss chart below to specify a suit-
able pump.
PRESSURE LOSS CHART 055 / 105 / 155 MODEL ONLY
500
400
300
200
100
0
0
100
200
300 400
LITRES / MIN
PRESSURE LOSS CHART 185 / 265 / 405 MODELS ONLY
600
500
400
300
200
100
0
100
200
300 400
LITRES / MIN
Heater must be located so that any water leaks will
not damage the structure of adjacent area. High
temperature 2" plastic pipe (CPVC) may be threaded
directly into the Cast Iron header fl anges. This is
not the same as the Schedule 80 PVC pipe which is
also coloured grey. PVC may be used immediately
after the CPVC adapters.
NOTE:
If operating pressure above 2 bar (30psi) are
encountered then connection pipes must either be
screwed into the fl ange or suitably anchored.
CAUTION: NEVER install PVC directly into Cast Iron
header fl anges.
FLOW RATES
MINIMUM/min. MAXIMUM/min.
MODEL
PIPE SIZE
Litres (Gals) Litres (Gals)
055 1
-1/4
"-1
-1/2
"
77 (17)
225 (50)
105 1
-1/4
"-1
-1/2
"
77 (17)
220 (49)
155 1
-1/4
"-1
-1/2
" -2"
77 (17)
430 (95)
185 1
-1/4
"-1
-1/2
" -2"
77 (17)
470 (104)
265 1
-1/4
"-1
-1/2
" -2"
95 (21)
470 (104)
405 1
-1/4
"-1
-1/2
" -2"
150 (33)
470 (104)
*When fl ow rates exceed maximum an external aux-
iliary bypass valve is required. See external bypass
valve section for details.
COMPANION FLANGE CONNECTIONS
DO NOT
use petroleum base assembly fl uids (such
as Petroleum Jelly or lubricating oil). If assembly lube
is required, use a silicone grease.
055 Model Only
The inlet/outlet header fl ange accepts a 1
½" cop-
per tube or 1¼" galvanized pipe as a slip connec-
tion directly into the manifold. The fl ange is also
threaded for 1½" pipe thread.
M
B
A
R
M
B
A
R
