Table of Contents
Advertisement
6.0
WATER CONNECTIONS
6.1 GENERAL
1.
Circulating pipework should be insulated; cisterns, expansion vessels and pipework situated in
areas exposed to freezing conditions should also be insulated.
2.
Drain valves must be located in accessible positions that will permit draining of the entire
system.
3.
Ideally, individual valves should be fitted to each unit to enable isolation from the system.
6.2 OPEN VENTED SYSTEM
The Lochinvar SST can be used in an open vented arrangement provided that a vent pipe in accordance
with CP342 or BS6700 is fitted. The minimum static head requirement for an open vented system will
be detailed in the ICM Instructions of the primary heat source. If you require a pipework schematic for
multiple appliances please contact Lochinvar Limited.
BUILDING
FLOW
6.2.1
RECOMMENDED PIPEWORK FOR A CONDENSING CIRCULATING APPLIANCE
BUILDING
FLOW
6.2.2
RECOMMENDED PIPEWORK FOR A STORAGE APPLIANCE
COLD WATER
STORAGE CISTERN
VENT PIPE
WARNING
PIPE
IV
COLD WATER
DISTRIBUTION
PIPE
TPRV
TD
*
NRV
STORAGE VESSEL
IV
IV
COLD WATER STORAGE TANK
IV
COLD WATER SUPPLY TO BUILDING
STORAGE VESSEL
IV
IV CP
IV
NRV
IV BRP
IV
NRV
BUILDING
RETURN
BUILDING
RETURN
IV
= ISOLATION VALVE
NRV = NON-RETURN VALVE
TD
= TUNDISH
LSV = LOCKSHIELD VALVE
IV
TPRV = TEMPERATURE & PRESSURE RELIEF VALVE
BRP
DV
= DRAIN VALVE
BRP = BUILDING RETURN PUMP
IV
PCP = PRIMARY CIRCULATING PUMP
*
= OPTIONAL
NRV
CONDENSING
EV
CIRCULATING
WATER HEATER
TD
IV
IV
PCP
IV
IV
= ISOLATION VALVE
NRV = NON-RETURN VALVE
TD
= TUNDISH (OPTIONAL)
TPRV = TEMPERATURE & PRESSURE RELIEF VALVE
CP
= CIRCULATING PUMP
BRP = BUILDING RETURN PUMP
TPV = THREE PORT VALVE
*
= OPTIONAL
VENT PIPE
IV
EV
TD
NRV
STORAGE WATER
HEATER
IV
7
Advertisement
Table of Contents
