QA/IOM/63 ISSUE 2 – DERV
INSTALLATION, OPERATING AND MAINTENANCE INSTRUCTIONS
DERV(DX
/CHW
)
UNITS
C
/W CH
IL
L
E
D
WA
T
R
A
N
S
P
IT SY
M
X
CO
O
ING
Страница 1: ...QA IOM 63 ISSUE 2 DERV INSTALLATION OPERATING AND MAINTENANCE INSTRUCTIONS DERV DX CHW UNITS C W CHILLED WATER AND SPLIT SYSTEMDX COOLING...
Страница 2: ...and are designed to be mounted out of sight above false ceilings suspended from the ceiling slab The supply and extract sections terminate in sheet metal flanges for the attachment of ducting Ducting...
Страница 3: ...ulb C 17 1 16 0 15 7 15 7 Heat recovery heat pipe cooling load saving W 1225 2009 3665 6340 Wraparound heat pipe precool load saving W 622 1040 1660 3320 Wraparound heat pipe reheat load saving W 622...
Страница 4: ...at pipe reheat load saving W 1040 1660 2504 3320 Power supply V Ph Hz 230 1 50 230 1 50 230 1 50 230 1 50 Nominal current draw A 1 0 1 7 2 0 3 4 Nominal power draw W 230 391 460 782 Weight kg 100 130...
Страница 5: ...2 DERV Page 5 of 19 Detailed unit dimensions and construction information is highlighted on the figure below Figure 1 Physical unit data Outdoor unit sizes for DERVDX models are given in the performa...
Страница 6: ...xing lugs at each of the corners of the unit 6 off on the size 500 Each of these lugs incorporates a rubber bush to prevent unit vibrations being directly transmitted to the mounting support rods The...
Страница 7: ...uid line upstream of the expansion device Unit size Liquid line OD Vapour line OD DERVDX 150 3 8 5 8 DERVDX 250 3 8 7 8 DERVDX 375 3 8 7 8 DERVDX 500 1 2 1 1 8 Table 2 Recommended refrigerant line siz...
Страница 8: ...ld be fitted as close as possible to the liquid connection on the coil 4 3 3 Evacuation After leak testing the pipework should be evacuated before any of the valves are opened The vacuum pump should b...
Страница 9: ...minimum wire size for the power supply should be 1mm2 The terminal block is accessible on the side of the indoor unit The 3 core power cable should be connected to this terminal block as shown on the...
Страница 10: ...units While all indoor units use a single phase supply the outdoor units for the larger models size 375 and 500 are three phase as shown above For the smaller single phase units 150 250 a three wire...
Страница 11: ...um of 2A 5A 500 unit If one or both of the remote contacts are not used then links must be fitted between R1 R2 and R3 R4 The controller is connected to a thermistor sensor located between the heat re...
Страница 12: ...cooling coil heat pipe section There is an individual drain pipe extending out from the side of each drainpan These drainpipes are 30mm diameter plastic and must be properly trapped in order to ensur...
Страница 13: ...also eliminate any noise problems If the ducting runs through areas subject to high humidity then the ducting should be lagged to prevent moisture formation this is particularly important for the supp...
Страница 14: ...ual switching or via relay If the units are to be controlled from a central system or BEMS then the requirement for ventilation should be sensed via occupancy or carbon dioxide sensors DERVDX units ha...
Страница 15: ...ear any debris from the surfaces This will involve removal of access panels and in some instances removal of the ducting attached to the spigots of the DERV unit Indoor unit general cleaning The outer...
Страница 16: ...mperature No chilled water available Check chilled water supply Chilled water flowrate too low Check position of valves and pump operation Chilled water temperature too high Check chiller operation or...
Страница 17: ...cting Check damper positions Insufficient cooling No chilled water available Check chilled water supply Chilled water flowrate too low Check position of valves and pump operation Chilled water tempera...
Страница 18: ...oor fan not running Repair or replace Air in system Recover evacuate and recharge Low head pressure high vapour pressure Defective compressor valves Replace Low vapour pressure cold compressor indoor...
Страница 19: ...QA IOM 63 ISSUE 2 DERV Page 19 of 19 SPC Heat Pipes FZC PO Box 50816 Dubai UAE Tel 0097143341178 Fax 0097143341179 e mail spcoils spcoils ae Web www spcoils ae...
