Toshiba Estia RUA-CP1701H, Service Manual

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Monobloc Outdoor Unit Service Manual
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Legend for Refrigerant system diagrams:
# Description
A
Water pump – main water pump – primary loop
(variable speed / fixed speed models)
B
Water high pressure safety relief valve [300kPa]
(variable speed / fixed speed models)
C Flow switch
D
Water filter (variable speed / fixed speed models).
An external water filter must be installed on pumpless models (field supply)
F
Drain valves
(variable speed / fixed speed models)
G
Expansion vessel
(variable speed / fixed speed models)
H
Hydronic module (optional). The hydronic module is equipped with either a fixed or variable speed single
pump, with an expansion vessel
1
Variable speed rotary compressor
2
2 way solenoid valve (warm up on system start)
3
Reversing 4 way valve (energised in heating mode)
4
Brazed plate heat exchanger (BPHE)
5
Receiver
6 Pulse modulating valve (2 x PMV for 21kW unit)
7 Sight glass
8
Dryer filter
9
Air cooled heat exchanger
10 Accumulator
11 High pressure switch (4.15 MPa)
12 Pressure safety release valve (suction on BPHE)
13 Low pressure transducer (mounted on Schrader valve)
14 Pressure safety release valve (suction)
15 LP service automatic Schrader port
16 HP service automatic Schrader port
17 Electric heater on BPHE (water anti-freeze protection)
18 Electrical heater on BPHE inlet pipe (hydronic module option only) – anti-freeze protection
19 Upper and lower fans