Grant Products HPAW155 - Manual (Page 37)

Commissioning
33
Notes:
a) Access = 1 is available at all times. To access settings menu with access = 0, remove the front control panel cover then remove
the screw at the base of the BTC. Select the DIP switch 1 to ‘ON’. When the parameters have been set, switch the DIP switch
back to OFF and replace the cover.
b) OUTDR START and BOIL START must always be the same figure.
c) These settings are suitable for a system design of -3˚C to 21˚C. If any other design criteria is used, alter these settings to match
the design.
d) If a buffer or thermal store is being used, change MASS to a suitable setting.
e.g. MASS = 1 (lo) for Monovalent system (no buffer or thermal store)
MASS = 2 (med) for Bivalent system (no buffer or thermal store)
MASS = 3 (Hi) for Bivalent system (with buffer or thermal store)
e) DHW BOIL TARGET of 48˚C assumes the cylinder thermostat setting of 45˚C and thereafter, heated by an auxiliary source – e.g.
immersion element, boiler etc.
f) Pump Delay should be set for about 2 minutes.
g) WWSD should always be set 3˚C higher that the BOIL START setting.
BTC Settings Menu
Item Access Active Mode Default Range
OUTDR Start 1 Always All 21˚C 1 to 29˚C
OUTDR DSGN 1 Always All -3˚C -50 to 0˚C
BOIL START 1 Always All 21˚C 1 to 65˚C
BOIL DSGN 1 Always All 48˚C 21 to 104˚C
BOIL MAX 0 Always All 55˚C 48 to 107˚C, OFF
BOIL MIN 0 Always All OFF OFF, 26 to 82˚C
MASS 0 Always All 1 (lo) 1(lo)<>2(med)<>3(Hi)
DIFF 0 Always All AU AU, 1 to 23˚C
DHW BOIL TARGET 0 Always All 48˚C OFF, 21 to 104˚C
‘pump’ DLY 0 Always All 20 secs OFF, 20 secs to 9:55 mins
WWSD (Warm Weather
1 Always All 24˚C 1 to 38˚C, OFF
Shut Down)
Take a note of these settings and write them in the Commissioning sheet in section 11.4.