Technical data

2.0 GENERAL REQUIREMENTS
2.1 COMPONENTS SUPPLIED
1. Premier Plus unvented solar water heater incorporating immersion heater(s) and thermal controls
2. Factory tted temperature/pressure relief valve
3. Cold water combination valve.
4. Expansion vessel and mounting bracket.
5. Tundish.
6. Motorized valve (indirect models only).
7. Compression nuts and olives
8. Immersion heater key spanner
2.2 SITING THE UNIT
The Santon Premier Plus Solar must be installed vertically. Although location is not critical, the following points
should be considered:
• TheSantonPremierPlusSolarshouldbesitedtoensureminimumdeadlegdistances,particularlytothe
point of most frequent use.
• Avoidsitingwhereextremecoldtemperatureswillbeexperienced.Allexposedpipe-workshouldbe 
insulated.
• Thedischargepipe-workfromthesafetyvalvesmusthaveminimumfallof1:200fromtheunitandterminate
in a safe and visible position.
• Accesstoassociatedcontrolsandimmersionheatersshouldbepossibletoallowforperiodicservicingand
maintenance.
• EnsurethatthebasechosenfortheSantonPremierPlusSolarislevelandcapableofpermanentlysupporting
the weight when full of water (see Table 2)
2.3 OUTLET/TERMINAL FITTINGS (TAPS, ETC.)
The Santon Premier Plus Solar can be used with most types of terminal ttings. It is advantageous in many mixer
showers to have balanced hot and cold water supplies. In these instances a balanced pressure cold water connection
should be placed between the cold water combination valve and the Premier Plus water heater. Outlets situated
higher than the Santon PremierPlus Solar will give outlet pressures lower than that at the heater, a 10m height dif-
ference will result in a 1 bar pressure reduction at the outlet.
2.4 LIMITATIONS
The Premier Plus unvented solar water heater should not be used in association with any of the following:
• Solidfuelboilersoranyotherboilerinwhichtheenergyinputisnotundereffectivethermostaticcontrol
unless additional and appropriate safety measures are installed.
• Ascendingspraytypebidetsoranyotherclass1backsyphonageriskrequiringthatatypeAairgapbe 
employed.
• Steamheatingplantsunlessadditionalandappropriatesafetydevicesareinstalled.
• Situationswheremaintenanceislikelytobeneglectedorsafetydevicestamperedwith.
• Watersuppliesthathaveeitherinadequatepressureorwherethesupplymaybeintermittent.
• Situationswhereitisnotpossibletosafelypipeawayanydischargefromthesafetyvalves.
• Inareaswherethewaterconsistentlycontainsahighproportionofsolids,e.g.suspendedmatterthatcould
block the strainer, unless adequate ltration can be ensured.
5
The PremierPlus solar cylinder is to be used for the storage of wholesum water (max 250mg/l Chloride)