T E C H N I C A L A N D I N S T A L L A T I O N
12
**Calculated values.
7.
MAINTENANCE
ACV recommends that the cylinder is maintained by a competent person, this should be carried out every
12 months.
The safety valves must be manually operated at least once a year to check their operation and re-seating.
Allow cylinder to cool before slowly twisting open the temperature and pressure relief valve. The water
should flow freely through the tundish and discharge pipe work, check that the valve reseats when
released.
CAUTION: The water discharged may be very hot.
Repeat the steps above for the expansion relief valve on the cold inlet pipe work.
The pressure reducing valve (PRV) has a strainer that can be removed for inspection and if necessary
cleaning.
i.
Isolate the cold water inlet to the cylinder.
ii.
Open the lowest hot tap to remove the pressure from the system.
iii.
The plastic PRV cartridge can be unscrewed from the brass valve body, loosen using a suitable
spanner (not stilsons or pump pliers) unscrew and pull the cartridge from the valve body, the
strainer will be withdrawn with the cartridge.
iv.
Remove the strainer from the cartridge and clean under running water if necessary.
v.
Replace strainer and push cartridge into valve body, take care when screwing the cartridge in not
to damage the threads. Do not over tighten.
vi.
Close hot tap and slowly open the cold water isolating valve to the cylinder, check for any leaks.
The primary tank should be checked for a build up of air, this can be purged using the primary air vent on
the top of the cylinder. Check the primary system pressure gauge on the boiler or filling loop and recharge
as necessary.
IMPORTANT: If the primary system is being topped up on a regular basis there is a risk of corrosion
damage to the cylinder.
The tank must be fitted by means of screwed couplings or flanges to allow dismantling and removal of the
unit. These should be fitted in such a way as to allow easy access.
8.
PARTS LIST
Description
Code
Description
Code
Control Thermostat
54442045
Cold Inlet Tube 130
497B0003
High Limit Thermostat
54764020
Cold Inlet Tube 160
497B0005
Manual Air Vent
55445006
Cold Inlet Tube 210+
497B0007
Thermostat Dry Well 130
39438027
Cold Inlet Tube 240+
497B0009
Thermostat Dry Well 160
39438039
Cold Inlet Tube 300+
497B0010
Thermostat Dry Well 210+
39438046
Complete Control Pod (stat to left)
24614152
Thermostat Dry Well 240+
39438047
Complete Control Pod (stat in centre)
24614114
Thermostat Dry Well 300+
39438047
3kW Immersion (Thermco)
OI300
Top Cover
497B5010
6kW Immersion Single Phase (ACV)
10800083
