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4.23 Positioning of the user circuit water inlet sensor (BTI)
The correct positioning of the BTI sensor is extremely important to guarantee the correct operation of the heat pump. The BTI sensor is
used to cycle the unit to maintain the user water temperature at set point. The BTI sensor is also used to activate the user water pump
and to stop it when the user water temperature set point is reached. The BTI sensor MUST be positioned in order to measure the water
temperature of the secondary circuit.
To guarantee the correct measurement of the temperature insert the probe in the sensor pocket of the buffer tank.
Correct Position of BTS sensor
Correct Position of BTI sensor
35
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EV
EXPANSION VALVE
EXV
EXPANSION VESSEL
AVM
ANTI VIBRATION MOUNT
IV
ISOLATION VALVE
NRV
NON RETURN VALVE
AS
AIR SEPARATOR
DS
DIRT SEPARATOR
PMP
PUMP
AV
AIR VENT
FR
FLOW REGULATOR/COMMISS
AVC
ANTI VIBRATION COUPLING
TS1/TS2
ASHP TEMP SENSORS
BTS
TANK TEMP SENSOR
HL
HIGH LIMIT STAT
FSW
FLOW SWITCH
TPRV
TEMP AND PRESSURE RELIE
TD
TUNDISH
STR
IN-LINE STRAINER (INLET SID
DV
DRAIN VALVE
PRV
PRESSURE REDUCING VALV
TP
TEMP/PRESSURE GAUGE
DCV
DOUBLE CHECK VALVE
3PV
THREE PORT VALVE
1
SH
SA
22/01/21
REV
DRAWN CHKD
DATE
D
Description :
1 x ASHP working with a buffer provding heating
SHEET SIZE
A3
SCALE
NTS
DRAWING NO.
Lochinvar Ltd reserves the right to change specifications without
Rev. A 11-2020
All necessary additional valves and fittings to be determined
than Lochinvar Ltd.
Lochinvar Limited may provide technical advice and guidance
best practice, optimisation and installation of Lochinvar product
will not be liable for any duties as Designers under Constructio
Management Regulations 2015). In all cases where informati
the customer must assess and manage risks associated with
information and advice provided.
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