15
14
6x
465
435
20
20
13
230
248
Ø 8
Ø 8
(*1 /# ޕ0.#$)"4Ҋ+..
before installing the HIU.
Over pressure relief pipe (G)
Over pressure relief pipe is a 15mm
*++ -+$+ ѵ' . 0. .0$/' ޔ//$)".
/ systems to make the connection with
the drain pipe.
6. Installation
Installation
Pressure Gauge
7.1 Filling the SH
7. Service
# ) ޔ'' 4*)) /$)") 3/ -)'.0++'4
/#-*0"#/# ޔ''ҝ-$)1'1 $)/# 0)$/ѵ
CAUTION!
Please use caution when handling the HIU.
Parts and components may be hot or energized.
Contact may lead to shock, burn or electrocution.
1. Disconnect the HIU from the mains power.
2. Open all space heating circuits in the property. Turn
the room thermostat and all radiator thermostats to
their maximum setting. (or switch on all underfoor
heating circuits).
3. Remove the case from the unit as described in
chapter 7.6
4.
*)) //# ޔ''$)"#*. ҝ'**+/*/# 1'1 ..#*2)ѵ
5.
- !0''4*+ )/# 1'1 )./-/ޔ''$)"/# .4./ (ѵ
Observe for leaks during the process.
6.
#0//# 1'1 *) /# .4./ ($.ޔ'' ѵ
7. Bleed the air from the system (HIU and radiators).
Please refer to chapter 7.2.
8. Repeat 6. and 7. until all air is removed and the
.4./ ($.+- ..0-$. *-$)"/*/# .+ $ޔ/$*).ѵ
