Vessel Temperature Sensor Multiple Water Heater Installation; Sensor Wiring; Schematics; Key For Schematics - Lochinvar ECOKNIGHT EKW116CE Installation, Commissioning, Maintenance And User Instructions

1.1 VESSEL TEMPERATURE SENSOR MULTIPLE WATER HEATER INSTALLATION

When installing multiple water heaters it is recommended that the water heaters are installed using the cascade management system,
see section 21.6. When in cascade only the lead water heater and alternate lead have tank sensors fitted see 1.1.1. The lead water
heater will monitor the tank temperature and control the water heaters within the cascade, in the event of a failure of the lead water
heater then the alternate leader will take over control of the system, hence it is also required to have a tank sensor fitted.
It may not be possible to fit two sensors into a single tank when using a cascade system with lead/alternate
lead. If there are two tanks then the alternate lead can have its sensor placed in the second tank see 14.5.1,
due to the fact the vessels should be balanced then the temperature will be the same in both tanks. If the
system only has a single tank then the alternate lead will need to use a strap on sensor located onto the
pipework near to the tank see 14.3.1 – this is less accurate but will allow the system to continue operating
whilst the lead water heater is repaired.

SENSOR WIRING

For guidance on installing the wiring for the temperature sensor, please refer to Section: 15.5.1

15.0 SCHEMATICS

1.1 KEY FOR SCHEMATICS

Lochinvar limited may provide technical advice and guidance to assist with best practice, optimisation and
installation of Lochinvar products; however, we will not be liable for any duties as designers under
construction (design and management regulations 2015). In all cases where information is provided, the
customer must assess and manage risks associated with the technical information and advice provided.
SYMBOL
TPRV
IV
LSV
TD
EXV
EV
PRV
NRV
PCP
TS
JB
BRP
PCP
RLY
SS
DESCRIPTION
ISOLATION VALVE
LOCKSHIELD VALVE
TEMPERATURE AND PRESSURE RELEIF VALVE
TUNDISH
EXPANSION VESSELQ
EXPANSION VALVE
PRESSURE REDUCING VALVE
NON RETURN VALVE
PRIMARY CIRCULATING PUMP
TEMPERATURE SENSOR (VESSEL SENSOR)
JUNCTION BOX
BUILDING RETURN PUMP
PRIMARY CIRCULATING PUMP
RELAY
STRAP ON PIPE SENSOR
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