Cascading; System Setup - Lochinvar EFW 85 Installation, Commissioning, User And Maintenance Instructions

17 CASCADING

System setup

NOTE:
To ensure the system operates correctly some settings have to be changed, see § 16.4.1 "Emergency mode".
The water heater controller can control multiple water heaters in a cascade setup.
A system sensor input is available on the main board to measure the cascade system supply temperature. A
pump output is also available to run the system pump, as well as an output for the DHW pump.
The system sensor is connected to the managing water heater which calculates the HW setpoint for the cascade
system.
Drawings Master Key
Number
1
2 Pressure Reducing Valve
3
4
5
6
7
8 Temperature & Pressure Relief Valve
9
11 Tank Temperature Sensor
33 Strap on Temperature Sensor
Description
Isolation Valve
Non-Return Valve
Lockshield Valve
Expansion Vessel
Tundish
Expansion Valve
Pump
Notes:
Installation must always
follow the drawing above.
If there is more than one
tank the tank sensor must
still be mounted in one for
the tanks.
Cascade control can han-
dle up to 16 water heaters.
For further advice contact
Lochinvar technical sup-
port
E93.1804.014
101