Temperature And Humidity Specifications; Magnet Room Venting Requirements - GE SIGNA EXPLORER Installation Manual

TEMPERATURE AND HUMIDITY SPECIFICATIONS

IN-USE CONDITIONS
Temperature
AREA
Range
EQUIPMENT ROOM at Inlet
15-28 * 59-82.4 *
MAGNET ROOM 15-21 59-69.8
CONTROL ROOM 15-32 59-89.6
OUTDOOR (11kw Chiller) -30-43 -22-110
NOTE
** Room temperature gradient specification applies from floor to height of top discharge of equipment cabinets.
The altitude is from 30.5 m [100 ft] below sea level to 2438 m [7992 ft] above sea level.
AIR RENEWAL
According to local standards.
NOTE
In case of using air conditioning systems that have a risk of water leakage it is recommended not to install it above
electric equipment or to take measures to protect the equipment from dropping water.
HEAT DISSIPATION DETAILS
DESCRIPTION
Magnet (MAG) and Patient Table (PT)
Blower Box (MG6)
Magnet Monitor (MON)
System Cabinet (SC)
Operator Workspace with LCD Color Display (GOC)
Water Chiller for BRM (4kW LCS) (WC1)
Water Chiller for SC (8kW LCS) (WC2)
Shield/Cryo Cooler Compressor - Water Cooled (CRY)
GE pre-engineered Main Disconnect Panel (MDP)
Magnetic Resonance Elastography (MRE)
Typical
Maximum
Humidity
Room Gradient
Change /Hr
Range % Change %
3 5 30-75 * 5 3** 5**
3 5 30-60 * 5 3 5
3 5 30-75 * 5 3 5
- - 5-100 - - -
ROOM MAX W
Magnet Room
2400
Magnet Room
1000
Control/Equipment Room 60
Control/Equipment Room 5000
Control/Equipment Room 1450
Control/Equipment Room
1670
Control/Equipment Room
1670
Control/Equipment Room 500
Options
Control/Equipment Room 264
Equipment Room
200
SIGNA EXPLORER /SIGNA CREATOR

MAGNET ROOM VENTING REQUIREMENTS

HVAC VENT REQUIREMENTS
HVAC vendor must comply with Magnet room temperature and humidity specifications and RF shielding specifications.
RF Shield vendor must install open pipe or honeycomb HVAC waveguides.
All serviceable parts in the Magnet room (e.g.: diffusers) must be non-magnetic.
Waveguides must be nonmagnetic and electrically isolated.
Incoming air must contain at least 5% air from outside the Magnet room (inside or outside the facility) to displace
residual helium.
EMERGENCY VENT REQUIREMENT
Exhaust vent system is supplied by the customer.
All items within the RF enclosure must be non-magnetic.
The exhaust vent system must be tested and operational before the magnet is installed.
The exhaust intake vent must be located near the magnet cryogenic vent at the highest point on the finished or drop
ceiling.
The Magnet room exhaust fan and exhaust intake vent must have a capacity of at least 1200 CFM (
minimum of 12 room air exchanges per hour.
The exhaust fan must be placed above RF shielding located outside 10 gauss (1mT) and with appropriate waveguide.
The system must have a manual exhaust fan switch near the Operator Workspace and in the Magnet room near the
door (the switches must be connected in parallel).
All system components must be accessible for customer inspection, cleaning and maintenance
PRESSURE VENT REQUIREMENT
A pressure equalizing vent is required in the magnet room ceiling or in the wall, at the highest point possible.
The vent minimum size must be (610 mm x 610 mm [24 in x 24 in]) or equivalent.
The pressure equalization vent must be located so any Helium gas is not vented into occupied areas.
Note: Location may affect acoustic noise transmission into occupied spaces.
MAGNET ROOM EXHAUST FAN SCHEMATIC
MAX BTU
Dielectric Isolator
8189
RF Shield
3415
205
17000
Exhaust Intake Vent
4947
5695
5695
1706
Room ceiling
900
682
MAGNET ROOM
EN-MRI-TYP-SIGNA_EXPLORER-WEB.DWG
Vent to outside
environment
Ductwork
To Facility
Ductwork
Air Handler
Motorized Damper
ON/OFF
Manual
fan switches in
parallel
RF Filter
CONTROL ROOM
Rev A Date 03/Aug/2018
) with a
Exhaust Fan
AC Power (rated as required
for operation of Motorized
Damper and Exhaust Fan)
Ground secondary of low
voltage transformer to RF
Room Common Ground Stud
M2 - HVAC-Venting 15 /24