Toshiba Carrier TCB-IFDMR01UP-UL Guide page 41

7-12. Dx-valve kit Installation
Installation Avoid locations in direct sunlight.
Standard Rating ; IPX4
Environment Insulation should be fi tted to Dx-valve kit (locally sourced).
Ideally the Dx-valve kit should be contained within the AHU. If installed outside, a cover
(locally sourced) should be fi tted to protect from wind and rain in addition to Insulation.
Installation The supplied components need to be assembled on to the DX COIL using custom locally sourced
pipework.
The PMV (Pulse Motor Valve) must be NOT installed upside down (PMV Motor on bottom).
The connection angle between PMV body and PMV Motor is fi xed at the factory (using thread lock)
and should not be changed. The PMV Motor should not be removed from PMV body.
Carefully handle and prepare the PMV when fi tting to prevent ingress from foreign matter such as
dust or water.
Brazing ● PMV
A) Whilst brazing, the PMV body and PMV Motor must be water cooled to keep the component's
temperature does not exceed 248°F (120°C).
B) Whilst brazing, nitrogen gas must flowed through the PMV body and pipework to prevent internal
oxidization.
C) Prevent cooling water from getting inside the PMV body and connector of the lead during brazing.
D) Take care not to damage the PMV cables during brazing.
● Sensor holders
• To ensure reliable operation, all Sensor holders must be fitted by brazing.
• Be careful of that the brazing material does not enter into the sensor holder when attaching the
TC1, TC2 and TCJ sensor holder.
TC1 Sensor : Install it in the collecting part of the gas header.
TC2 Sensor : Install it in the between the liquid pipe distributor and the PMV.
TCJ Sensor : Install it in the pass where the temperature of the capillary tube is the lowest.
If the TC1, TC2 or TCJ sensors are easy to be subjected to the surrounding thermal effect,
cover them with the heat insulator material, and fi x them with the fi xing band
TC1, TC2 and TCJ sensor position on DX COIL
Gas pipe
PMV: Pulse
Dx-valve kit
Motor Valve
Strainer
Brazing
Heat insulator
Liquid pipe
Braze the TC1 sensor on the location of the lower side 45° to detect the
stable temperature.
(TC2 sensor is attached to the refrigerant cycle of AHU.)
Capillary Tube
Max
16' 5" (5 m)
Distributor
TCJ Ø0.24" (6 mm)
(Brazing)
2" (50 mm) ± 1" (25 mm) from the end plate
TC2 Ø0.24" (6 mm)
(Brazing)
Dx-valve kit: 1 set DX COIL type: Normal
– 39 –
AHU
DX COIL
TC1 Ø0.16" (4 mm)
Gas pipe
45° Sensor holder
TC1 sensor holder
Header
(Brazing)
EN