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Summary of Contents for SPC DERV
- Page 1 INSTALLATION, OPERATING AND MAINTENANCE INSTRUCTIONS QA/IOM/63 ISSUE 2 – DERV...
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Page 2: General Description
2 Technical Details The table below gives details of the nominal operating characteristics of the DERV units along with pertinent weights and dimensions. Operating limits for the units are as follows: Maximum outside air temperature: 55° C Minimum outside air temperature: 5°... - Page 3 Coil outlet connection size (mm) The conditions upon which the above data is based are as follows: Outside air @ 46/30° C Extract air @ 25° C CHW flow/return @ 7.2/12.8° C QA/IOM/63 ISSUE 2 - DERV Page 3 of 19...
- Page 4 1020x1270x406 1020x1270x406 Outdoor unit weight (kg) The conditions upon which the above data is based are as follows: Outside air @ 46/30° C Extract air @ 25° C Table1: Technical data QA/IOM/63 ISSUE 2 - DERV Page 4 of 19...
- Page 5 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 performance table above. QA/IOM/63 ISSUE 2 - DERV Page 5 of 19...
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Page 6: Reception & Storage
Care must be taken to ensure that the DERV(DX) unit is fixed to a structure that will accept the unit weight as shown in the above table and that vibrations are not transmitted. - Page 7 A flow of nitrogen should be directed through a service port and tubing while brazing. If flare joints are to be used these must be properly made ensuring the following: QA/IOM/63 ISSUE 2 - DERV Page 7 of 19...
- Page 8 3m of vertical height. When the outdoor unit is above the indoor unit the traps should be fitted in the suction line, if the indoor unit is above the outdoor unit then the traps need to be fitted in the liquid line. QA/IOM/63 ISSUE 2 - DERV Page 8 of 19...
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Page 9: Electrical Connections
The DERV units incorporate a built-in controller allowing the speed to be changed (speed 1,2 & 3) along with an on/off switch. Provision has also been made for remote control of the DERV units via two volt free contacts. - Page 10 1mm2. Both the indoor and outdoor units must be earthed and the power cables should be taken from the terminal block of the outdoor unit to the indoor unit terminal block. QA/IOM/63 ISSUE 2 - DERV Page 10 of 19...
- Page 11 & High) along with an on/off switch, see figure below. Provision has also been made for remote control of the DERV units via two volt free contacts. These contacts can be used to switch the units on and off remotely via switches or relays attached to BEMS, occupancy sensors etc. The two remote contacts are wired into terminals R1/R2 and R3/R4 respectively.
- Page 12 LEDs. 4.5 Drain connection piping The DERV(DX) units incorporate two internal draintrays; one beneath the heat recovery heat pipe and one beneath the cooling coil/heat pipe section. There is an individual drain pipe extending out from the side of each drainpan.
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Page 13: Ductwork Connections
The ducting can be transformed to a smaller size after the outlet spigot and can be transformed to circular ducting if this is preferred. A single DERV(DX) unit can be arranged to take its extract air from one or more sources and its supply ducting can be arranged to supply one or a number of different areas. -
Page 14: Maintenance
6 Maintenance It is suggested that the DERV(DX) units should be maintained on a monthly basis so as to ensure continued correct operation. The maintenance routine should involve the following: Filter cleaning: The indoor units incorporate two filters; one on the extract air side and one on the supply air side. -
Page 15: Fault Finding
DERV unit. Indoor unit general cleaning: The outer casing of the DERV(DX) unit is finished in corrosion resistant epoxy paint and can be wiped down with a wet cloth or with dilute cleaning agents. - Page 16 Drain trap dry Prime trap Drain trap too small Increase trap height Ductwork sweating Humid environment Insulate ducting Pipework sweating Uninsulated piping Insulate all piping Table 4. Fault finding DERV units QA/IOM/63 ISSUE 2 - DERV Page 16 of 19...
- Page 17 Check terminal wiring not run Thermostat not calling Check temperature setting Defective contactor Check voltage at contactor coil High pressure trip Reset Outdoor fan runs, Start capacitor/relay Replace compressor doesn't defective QA/IOM/63 ISSUE 2 - DERV Page 17 of 19...
- Page 18 Table 5. Fault finding DERVDX units 8 Spares Spare filters, fans, coils and other components are available for DERV(DX) units. These can be ordered with the units or subsequently. Please contact the local SPC office for details. QA/IOM/63 ISSUE 2 - DERV...
- Page 19 SPC Heat Pipes FZC PO Box 50816, Dubai, UAE Tel: 0097143341178, Fax: 0097143341179 e-mail: spcoils@spcoils.ae Web: www.spcoils.ae QA/IOM/63 ISSUE 2 - DERV Page 19 of 19...
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